1
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Sathe D, Yoon S, Wang Z, Chen H, Wang J. Deconstruction of Polymers through Olefin Metathesis. Chem Rev 2024; 124:7007-7044. [PMID: 38787934 DOI: 10.1021/acs.chemrev.3c00748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
The consumption of synthetic polymers has ballooned; so has the amount of post-consumer waste generated. The current polymer economy, however, is largely linear with most of the post-consumer waste being either landfilled or incinerated. The lack of recycling, together with the sizable carbon footprint of the polymer industry, has led to major negative environmental impacts. Over the past few years, chemical recycling technologies have gained significant traction as a possible technological route to tackle these challenges. In this regard, olefin metathesis, with its versatility and ease of operation, has emerged as an attractive tool. Here, we discuss the developments in olefin-metathesis-based chemical recycling technologies, including the development of new materials and the application of olefin metathesis to the recycling of commercial materials. We delve into structure-reactivity relationships in the context of polymerization-depolymerization behavior, how experimental conditions influence deconstruction outcomes, and the reaction pathways underlying these approaches. We also look at the current hurdles in adopting these technologies and relevant future directions for the field.
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Affiliation(s)
- Devavrat Sathe
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Seiyoung Yoon
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Zeyu Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Hanlin Chen
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
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2
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Pal A, Wong AR, Lamb JR. Chemically Recyclable, High Molar Mass Polyoxazolidinones via Ring-Opening Metathesis Polymerization. ACS Macro Lett 2024; 13:502-507. [PMID: 38625148 DOI: 10.1021/acsmacrolett.4c00147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
The development of robust methods for the synthesis of chemically recyclable polymers with tunable properties is necessary for the design of next-generation materials. Polyoxazolidinones (POxa), polymers with five-membered urethanes in their backbones, are an attractive target because they are strongly polar and have high thermal stability, but existing step-growth syntheses limit molar masses and methods to chemically recycle POxa to monomer are rare. Herein, we report the synthesis of high molar mass POxa via ring-opening metathesis polymerization of oxazolidinone-fused cyclooctenes. These novel polymers show <5% mass loss up to 382-411 °C and have tunable glass transition temperatures (14-48 °C) controlled by the side chain structure. We demonstrate facile chemical recycling to monomer and repolymerization despite moderately high monomer ring-strain energies, which we hypothesize are facilitated by the conformational restriction introduced by the fused oxazolidinone ring. This method represents the first chain growth synthesis of POxa and provides a versatile platform for the study and application of this emerging subclass of polyurethanes.
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Affiliation(s)
- Arpan Pal
- Department of Chemistry, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Allison R Wong
- Department of Chemistry, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Jessica R Lamb
- Department of Chemistry, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
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3
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Yang Y, Cho Y, Choi TL. Designing Degradable Polymers from Tricycloalkenes via Complete Cascade Metathesis Polymerization. Angew Chem Int Ed Engl 2024; 63:e202400235. [PMID: 38456570 DOI: 10.1002/anie.202400235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/18/2024] [Accepted: 03/06/2024] [Indexed: 03/09/2024]
Abstract
Cascade metathesis polymerization has been developed as a promising method to synthesize complex but well-defined polymers from monomers containing multiple reactive functional groups. However, this approach has been limited to the monomers involving simple alkene/alkyne moieties or produced mainly non-degradable polymers. In this study, we demonstrate a complete cascade ring-opening/ring-closing metathesis polymerization (RORCMP) using various tricycloalkenes and two strategies for the efficient degradation. Through rational design of tricycloalkene monomers, the structure and reactivity relationship was explored. For example, tricycloalkenes with trans configuration in the central ring enabled faster and better selective cascade RORCMP than the corresponding cis isomers. Also, a 4-substituted cyclopentene moiety in the monomers significantly enhanced the overall cascade RORCMP performance, with the maximum turnover number (TON) reaching almost 10,000 and molecular weight up to 170 kg/mol using an amide-containing monomer. Furthermore, we achieved one-shot cascade multiple olefin metathesis polymerization using tricycloalkenes and a diacrylate, to produce new highly A,B-alternating copolymers with full degradability. Lastly, we successfully designed xylose-based tricycloalkenes to give well-defined polymers that underwent ultra-fast and complete degradation under mild conditions.
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Affiliation(s)
- Yongkang Yang
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yunhyeong Cho
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Tae-Lim Choi
- Department of Materials, ETH Zürich, Zürich, 8093, Switzerland
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4
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Ibrahim T, Ritacco A, Nalley D, Emon OF, Liang Y, Sun H. Chemical recycling of polyolefins via ring-closing metathesis depolymerization. Chem Commun (Camb) 2024; 60:1361-1371. [PMID: 38213307 DOI: 10.1039/d3cc05612k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
The current insufficient recycling of commodity polymer waste has resulted in pressing environmental and human health issues in our modern society. In the quest for next-generation polymer materials, chemists have recently shifted their attention to the design of chemically recyclable polymers that can undergo depolymerization to regenerate monomers under mild conditions. During the past decade, ring-closing metathesis reactions have been demonstrated to be a robust approach for the depolymerization of polyolefins, producing low-strain cyclic alkene products which can be repolymerized back to new batches of polymers. In this review, we aim to highlight the recent advances in chemical recycling of polyolefins enabled by ring-closing metathesis depolymerization (RCMD). A library of depolymerizable polyolefins will be covered based on the ring size of their monomers or depolymerization products, including five-membered, six-membered, eight-membered, and macrocyclic rings. Moreover, current limitations, potential applications, and future opportunities of the RCMD approach will be discussed. It is clear from recent research in this field that RCMD represents a powerful strategy towards closed-loop chemical recycling of novel polyolefin materials.
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Affiliation(s)
- Tarek Ibrahim
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, CT, 06516, USA.
| | - Angelo Ritacco
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, CT, 06516, USA.
| | - Daniel Nalley
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, CT, 06516, USA.
| | - Omar Faruk Emon
- Department of Mechanical and Industrial Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, CT, 06516, USA
| | - Yifei Liang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
| | - Hao Sun
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, CT, 06516, USA.
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5
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Sun H, Ibrahim T, Ritacco A, Durkee K. Biomass-Derived Degradable Polymers via Alternating Ring-Opening Metathesis Polymerization of Exo-Oxanorbornenes and Cyclic Enol Ethers. ACS Macro Lett 2023; 12:1642-1647. [PMID: 37983535 DOI: 10.1021/acsmacrolett.3c00608] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Degradable polymers made via ring-opening metathesis polymerization (ROMP) hold tremendous promise as eco-friendly materials. However, most of the ROMP monomers are derived from petroleum resources, which are typically considered less sustainable compared to biomass. Herein, we present a synthetic strategy to degradable polymers by harnessing alternating ROMP of biomass-based cyclic olefin monomers including exo-oxanorbornenes and cyclic enol ethers. A library of well-defined poly(enol ether)s with modular structures, tunable glass transition temperatures, and controlled molecular weights was achieved, demonstrating the versatility of this approach. Most importantly, the resulting copolymers exhibit high degrees of alternation, rendering their backbones fully degradable under acidic conditions.
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Affiliation(s)
- Hao Sun
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, Connecticut 06516, United States
| | - Tarek Ibrahim
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, Connecticut 06516, United States
| | - Angelo Ritacco
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, Connecticut 06516, United States
| | - Katie Durkee
- Department of Chemistry and Chemical & Biomedical Engineering, Tagliatela College of Engineering, University of New Haven, West Haven, Connecticut 06516, United States
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6
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Deng Z, Gillies ER. Emerging Trends in the Chemistry of End-to-End Depolymerization. JACS AU 2023; 3:2436-2450. [PMID: 37772181 PMCID: PMC10523501 DOI: 10.1021/jacsau.3c00345] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/09/2023] [Accepted: 08/16/2023] [Indexed: 09/30/2023]
Abstract
Over the past couple of decades, polymers that depolymerize end-to-end upon cleavage of their backbone or activation of a terminal functional group, sometimes referred to as "self-immolative" polymers, have been attracting increasing attention. They are of growing interest in the context of enhancing polymer degradability but also in polymer recycling as they allow monomers to be regenerated in a controlled manner under mild conditions. Furthermore, they are highly promising for applications as smart materials due to their ability to provide an amplified response to a specific signal, as a single sensing event is translated into the generation of many small molecules through a cascade of reactions. From a chemistry perspective, end-to-end depolymerization relies on the principles of self-immolative linkers and polymer ceiling temperature (Tc). In this article, we will introduce the key chemical concepts and foundations of the field and then provide our perspective on recent exciting developments. For example, over the past few years, new depolymerizable backbones, including polyacetals, polydisulfides, polyesters, polythioesters, and polyalkenamers, have been developed, while modern approaches to depolymerize conventional backbones such as polymethacrylates have also been introduced. Progress has also been made on the topological evolution of depolymerizable systems, including the introduction of fully depolymerizable block copolymers, hyperbranched polymers, and polymer networks. Furthermore, precision sequence-defined oligomers have been synthesized and studied for data storage and encryption. Finally, our perspectives on future opportunities and challenges in the field will be discussed.
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Affiliation(s)
- Zhengyu Deng
- Department
of Chemistry, The University of Western
Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Elizabeth R. Gillies
- Department
of Chemistry, The University of Western
Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B9, Canada
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7
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von Vacano B, Mangold H, Vandermeulen GWM, Battagliarin G, Hofmann M, Bean J, Künkel A. Sustainable Design of Structural and Functional Polymers for a Circular Economy. Angew Chem Int Ed Engl 2023; 62:e202210823. [PMID: 36197763 DOI: 10.1002/anie.202210823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/04/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022]
Abstract
To achieve a sustainable circular economy, polymer production must start transitioning to recycled and biobased feedstock and accomplish CO2 emission neutrality. This is not only true for structural polymers, such as in packaging or engineering applications, but also for functional polymers in liquid formulations, such as adhesives, lubricants, thickeners or dispersants. At their end of life, polymers must be either collected and recycled via a technical pathway, or be biodegradable if they are not collectable. Advances in polymer chemistry and applications, aided by computational material science, open the way to addressing these issues comprehensively by designing for recyclability and biodegradability. This Review explores how scientific progress, together with emerging regulatory frameworks, societal expectations and economic boundary conditions, paint pathways for the transformation towards a circular economy of polymers.
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Affiliation(s)
| | - Hannah Mangold
- Group Research, BASF SE, 67056, Ludwigshafen am Rhein, Germany
| | - Guido W M Vandermeulen
- Functional Polymers R&D, Care Chemicals Division, BASF SE, 67056, Ludwigshafen am Rhein, Germany
| | | | | | - Jessica Bean
- Group Research, BASF SE, 67056, Ludwigshafen am Rhein, Germany
| | - Andreas Künkel
- Group Research, BASF SE, 67056, Ludwigshafen am Rhein, Germany
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8
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Su HW, Zhou J, Yoon S, Wang J. Evaluating Trans-Benzocyclobutene-Fused Cyclooctene as a Monomer for Chemically Recyclable Polymer. Chem Asian J 2023; 18:e202201133. [PMID: 36534946 PMCID: PMC10107132 DOI: 10.1002/asia.202201133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/13/2022] [Accepted: 12/19/2022] [Indexed: 12/23/2022]
Abstract
Chemically recyclable polymers offer a promising solution to address the issues associated with the unsustainable use of plastics by converting the traditional linear plastic economy into a circular one. Central to developing chemically recyclable polymers is to identify the appropriate monomers that enable practical conditions for polymerization and depolymerization and ensure useful stability and material properties. Our group has recently demonstrated that trans-cyclobutane-fused cyclooctene (tCBCO) meets the abovementioned requirements and is a promising candidate for developing chemically recyclable polymers. Herein, encouraged by the success with tCBCO, we investigate the thermodynamics of polymerization of a relevant system, trans-benzocyclobutene-fused-cyclooctene, which can be viewed as tCBCO with an additional benzene ring. The study shows that introducing an additional benzene ring favors polymerization and disfavors depolymerization, and the effect is predominantly entropic. The benzo-effect can be leveraged to fine-tune the thermodynamics of polymerization and depolymerization to facilitate the chemical recycling of polymers.
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Affiliation(s)
- Hsin-Wei Su
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, Ohio, 44325, USA
| | - Junfeng Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, Ohio, 44325, USA
| | - Seiyoung Yoon
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, Ohio, 44325, USA
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, Ohio, 44325, USA
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9
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Hsu TG, Liu S, Guan X, Yoon S, Zhou J, Chen WY, Gaire S, Seylar J, Chen H, Wang Z, Rivera J, Wu L, Ziegler CJ, McKenzie R, Wang J. Mechanochemically accessing a challenging-to-synthesize depolymerizable polymer. Nat Commun 2023; 14:225. [PMID: 36641481 PMCID: PMC9840636 DOI: 10.1038/s41467-023-35925-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
Polymers with low ceiling temperatures (Tc) are highly desirable as they can depolymerize under mild conditions, but they typically suffer from demanding synthetic conditions and poor stability. We envision that this challenge can be addressed by developing high-Tc polymers that can be converted into low-Tc polymers on demand. Here, we demonstrate the mechanochemical generation of a low-Tc polymer, poly(2,5-dihydrofuran) (PDHF), from an unsaturated polyether that contains cyclobutane-fused THF in each repeat unit. Upon mechanically induced cycloreversion of cyclobutane, each repeat unit generates three repeat units of PDHF. The resulting PDHF completely depolymerizes into 2,5-dihydrofuran in the presence of a ruthenium catalyst. The mechanochemical generation of the otherwise difficult-to-synthesize PDHF highlights the power of polymer mechanochemistry in accessing elusive structures. The concept of mechanochemically regulating the Tc of polymers can be applied to develop next-generation sustainable plastics.
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Affiliation(s)
- Tze-Gang Hsu
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Shiqi Liu
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Xin Guan
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Seiyoung Yoon
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Junfeng Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Wei-Yuan Chen
- Department of Chemistry, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Sanjay Gaire
- Department of Chemistry, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Joshua Seylar
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Hanlin Chen
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Zeyu Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Jared Rivera
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Leyao Wu
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Christopher J Ziegler
- Department of Chemistry, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Ruel McKenzie
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, 170 University Ave, Akron, OH, 44325, USA.
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10
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Recyclable polythioesters and polydisulfides with near-equilibrium thermodynamics and dynamic covalent bonds. Sci China Chem 2023. [DOI: 10.1007/s11426-022-1418-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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11
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Sathe D, Chen H, Wang J. Regulating the Thermodynamics and Thermal Properties of Depolymerizable Polycyclooctenes through Substituent Effects. Macromol Rapid Commun 2023; 44:e2200304. [PMID: 35686515 DOI: 10.1002/marc.202200304] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/17/2022] [Indexed: 01/11/2023]
Abstract
Chemical recycling to monomer (CRM) is a promising route for transitioning to a circular polymer economy. To develop new CRM systems with useful properties, it is important to understand the effects of monomer structure on polymerization/depolymerization behavior. In earlier work, this group demonstrated chemically recyclable polymers prepared by ring-opening metathesis polymerization of trans-cyclobutane fused cyclooctenes (tCBCO). Here, it is investigated how different substituents on cyclobutane impact the thermodynamics and thermal properties of tCBCO polymers. Introducing additional substituents to a cis-diester functionalized tCBCO is found to favor the conversion of polymerization; increased polymerization conversion is also observed when the cis-diester is isomerized into its trans counterpart. The effects of these structural features on the thermal properties are also studied. These findings can provide important insights into designing next-generation CRM polymers.
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Affiliation(s)
- Devavrat Sathe
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325, USA
| | - Hanlin Chen
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325, USA
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325, USA
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12
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Bermesheva EV, Medentseva EI, Khrychikova AP, Wozniak AI, Guseva MA, Nazarov IV, Morontsev AA, Karpov GO, Topchiy MA, Asachenko AF, Danshina AA, Nelyubina YV, Bermeshev MV. Air-Stable Single-Component Pd-Catalysts for Vinyl-Addition Polymerization of Functionalized Norbornenes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Evgeniya V. Bermesheva
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
- I.M. Sechenov First Moscow State Medical University, Trubetskaya str., 8, building 2, Moscow 119991, Russia
| | - Ekaterina I. Medentseva
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Anna P. Khrychikova
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
- D.I. Mendeleyev University of Chemical Technology of Russia, 9 Miusskaya sq., Moscow 125047, Russia
| | - Alyona I. Wozniak
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Marina A. Guseva
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Ivan V. Nazarov
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Alexander A. Morontsev
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Gleb O. Karpov
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Maxim A. Topchiy
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Andrey F. Asachenko
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
| | - Anastasia A. Danshina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow 119991, Russia
- Moscow Institute of Physics and Technology (National Research University), Institutskiy per., 9, Dolgoprudny, Moscow Region 141701, Russia
| | - Yulia V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow 119991, Russia
| | - Maxim V. Bermeshev
- A.V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninskiy pr., Moscow 119991, Russia
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13
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Yoon KY, Noh J, Gan Q, Edwards JP, Tuba R, Choi TL, Grubbs RH. Scalable and continuous access to pure cyclic polymers enabled by 'quarantined' heterogeneous catalysts. Nat Chem 2022; 14:1242-1248. [PMID: 36064971 DOI: 10.1038/s41557-022-01034-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 07/28/2022] [Indexed: 11/09/2022]
Abstract
Cyclic polymers are topologically interesting and envisioned as a lubricant material. However, scalable synthesis of pure cyclic polymers remains elusive. The most straightforward way is to recover a used catalyst after the synthesis of cyclic polymers and reuse it. Unfortunately, this is demanding because of the catalyst's vulnerability and inseparability from polymers, which reduce the practicality of the process. Here we develop a continuous circular process, where polymerization, polymer separation and catalyst recovery happen in situ, to dispense a pure cyclic polymer after bulk ring-expansion metathesis polymerization of cyclopentene. It is enabled by introducing silica-supported ruthenium catalysts and newly designed glassware. Different depolymerization kinetics of the cyclic polymer from its linear analogue are also discussed. This process minimizes manual labour, maximizes the security of vulnerable catalysts and guarantees the purity of cyclic polymers, thereby showcasing a prototype of a scalable access to cyclic polymers with increased turnovers (≥415,000) of precious catalysts.
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Affiliation(s)
- Ki-Young Yoon
- Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.,Ashland Specialty Ingredients, Bridgewater, NJ, USA
| | - Jinkyung Noh
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Quan Gan
- Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Julian P Edwards
- Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Robert Tuba
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Budapest, Hungary
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea. .,Department of Materials, ETH Zürich, Zürich, Switzerland.
| | - Robert H Grubbs
- Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
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14
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Halbach RL, Dupper T, López-Barrón CR, Kang S, Mattler SJ, Luo L, Zabula AV. Synthesis, Structural Studies, and Application of Aluminum Aryloxides for Ring-Opening Metathesis Polymerization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert L. Halbach
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Torin Dupper
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Carlos R. López-Barrón
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Shuhui Kang
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Sarah J. Mattler
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Lubin Luo
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
| | - Alexander V. Zabula
- ExxonMobil Product Solutions Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
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15
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Guillory GA, Marxsen SF, Alamo RG, Kennemur JG. Precise Isotactic or Atactic Pendant Alcohols on a Polyethylene Backbone at Every Fifth Carbon: Synthesis, Crystallization, and Thermal Properties. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gina A. Guillory
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Stephanie F. Marxsen
- Department of Chemical and Biomedical Engineering College of Engineering, Florida A&M University−Florida State University (FAMU-FSU), 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - Rufina G. Alamo
- Department of Chemical and Biomedical Engineering College of Engineering, Florida A&M University−Florida State University (FAMU-FSU), 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States
| | - Justin G. Kennemur
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
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16
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Coia BM, Werner SE, Kennemur JG. Conformational bias in density functional theory ring strain energy calculations of cyclopentene derivatives: Towards predictive design of chemically recyclable elastomers. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Brianna M. Coia
- Department of Chemistry and Biochemistry Florida State University Tallahassee Florida USA
| | - Sarah E. Werner
- Department of Chemistry and Biochemistry Florida State University Tallahassee Florida USA
| | - Justin G. Kennemur
- Department of Chemistry and Biochemistry Florida State University Tallahassee Florida USA
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17
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Blosch SE, Scannelli SJ, Alaboalirat M, Matson JB. Complex Polymer Architectures Using Ring-Opening Metathesis Polymerization: Synthesis, Applications, and Practical Considerations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Sarah E. Blosch
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Samantha J. Scannelli
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Mohammed Alaboalirat
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - John B. Matson
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
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18
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Olefin cross-metathesis of polynorbornene with polypentenamer: New norbornene−cyclopentene multiblock copolymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Foster JC, Cook AW, Monk NT, Jones BH, Appelhans LN, Redline EM, Leguizamon SC. Continuous Additive Manufacturing using Olefin Metathesis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200770. [PMID: 35274480 PMCID: PMC9108613 DOI: 10.1002/advs.202200770] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Indexed: 06/14/2023]
Abstract
The development of chemistry is reported to implement selective dual-wavelength olefin metathesis polymerization for continuous additive manufacturing (AM). A resin formulation based on dicyclopentadiene is produced using a latent olefin metathesis catalyst, various photosensitizers (PSs) and photobase generators (PBGs) to achieve efficient initiation at one wavelength (e.g., blue light) and fast catalyst decomposition and polymerization deactivation at a second (e.g., UV-light). This process enables 2D stereolithographic (SLA) printing, either using photomasks or patterned, collimated light. Importantly, the same process is readily adapted for 3D continuous AM, with printing rates of 36 mm h-1 for patterned light and up to 180 mm h-1 using un-patterned, high intensity light.
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Affiliation(s)
| | - Adam W. Cook
- Sandia National LaboratoriesAlbuquerqueNM87185USA
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20
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Shi C, Clarke RW, McGraw ML, Chen EYX. Closing the "One Monomer-Two Polymers-One Monomer" Loop via Orthogonal (De)polymerization of a Lactone/Olefin Hybrid. J Am Chem Soc 2022; 144:2264-2275. [PMID: 35084829 DOI: 10.1021/jacs.1c12278] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Two well-known low-ceiling-temperature (LCT) monomers, γ-butyrolactone (γ-BL) toward ring-opening polymerization (ROP) to polyester and cyclohexene toward ring-opening metathesis polymerization (ROMP) to poly(cyclic olefin), are notoriously "nonpolymerizable". Here we present a strategy to render not only polymerizability of both the γ-BL and cyclohexene sites, orthogonally, but also complete and orthogonal depolymerization, through creating an LCT/LCT hybrid, bicyclic lactone/olefin (BiL=). This hybrid monomer undergoes orthogonal polymerization between ROP and ROMP, depending on the catalyst employed, affording two totally different classes of polymeric materials from this single monomer: polyester P(BiL=)ROP via ROP and functionalized poly(cyclic olefin) P(BiL=)ROMP via ROMP. Intriguingly, both P(BiL=)ROP and P(BiL=)ROMP are thermally robust but chemically recyclable under mild conditions (25-40 °C), in the presence of a catalyst, to recover cleanly the same monomer via chain unzipping and scission, respectively. In the ROP, topological and stereochemical controls have been achieved and the structures characterized. Furthermore, the intact functional group during the orthogonal polymerization (i.e., the double bond in ROP and the lactone in ROMP) is utilized for postfunctionalization for tuning materials' thermal and mechanical performances. The impressive depolymerization orthogonality further endows selective depolymerization of both the ROP/ROMP copolymer and the physical blend composites into the same starting monomer.
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Affiliation(s)
- Changxia Shi
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Ryan W Clarke
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Michael L McGraw
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Eugene Y-X Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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21
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Zhou J, Sathe D, Wang J. Understanding the Structure-Polymerization Thermodynamics Relationships of Fused-Ring Cyclooctenes for Developing Chemically Recyclable Polymers. J Am Chem Soc 2022; 144:928-934. [PMID: 34985870 DOI: 10.1021/jacs.1c11197] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Polymers that can be chemically recycled to their constituent monomers offer a promising solution to address the challenges in plastics sustainability through a circular use of materials. The design and development of monomers for next-generation chemically recyclable polymers require an understanding of the relationships between the structure of the monomers/polymers and the thermodynamics of polymerization/depolymerization. Here we investigate the structure-polymerization thermodynamics relationships of a series of cyclooctene monomers that contain an additional ring fused at the 5,6-positions, including trans-cyclobutane, trans-cyclopentane, and trans-five-membered cyclic acetals. The four- and five-membered rings trans-fused to cyclooctene reduce the ring strain energies of the monomer, and the enthalpy changes of polymerizations are found to be in the range of -2.1 to -3.3 kcal mol-1. Despite the narrow range of enthalpy changes, the ceiling temperatures at 1.0 M span from 330 to 680 °C, due to the low entropy changes, ranging from -2.7 to -5.0 cal mol-1 K-1. Importantly, geminal substituents on the trans-five-membered cyclic acetal fused cyclooctenes are found to reduce the ceiling temperature by ∼300 °C, although they are not directly attached to the cyclooctene. The remote gem-disubstituent effect demonstrated here can be leveraged to promote depolymerization of the corresponding polymers and to tune their thermomechanical properties.
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Affiliation(s)
- Junfeng Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Devavrat Sathe
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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22
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Sathe D, Zhou J, Chen H, Schrage BR, Yoon S, Wang Z, Ziegler CJ, Wang J. Depolymerizable semi-fluorinated polymers for sustainable functional materials. Polym Chem 2022. [DOI: 10.1039/d2py00240j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Chemically recyclable semi-fluorinated polymers are demonstrated for the first time, and the hydrophobicity, self-assembly, and post-polymerization functionalization of these polymers are explored.
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Affiliation(s)
- Devavrat Sathe
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | - Junfeng Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | - Hanlin Chen
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | - Briana R. Schrage
- Department of Chemistry, The University of Akron, Akron, Ohio 44325, USA
| | - Seiyoung Yoon
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | - Zeyu Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | | | - Junpeng Wang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
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23
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A versatile approach for the synthesis of degradable polymers via controlled ring-opening metathesis copolymerization. Nat Chem 2021; 14:53-58. [PMID: 34795434 DOI: 10.1038/s41557-021-00810-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 09/08/2021] [Indexed: 12/11/2022]
Abstract
Norbornene derivatives (NBEs) are common monomers for living ring-opening metathesis polymerization and yield polymers with low dispersities and diverse functionalities. However, the all-carbon backbone of poly-NBEs is non-degradable. Here we report a method to synthesize degradable polymers by copolymerizing 2,3-dihydrofuran with NBEs. 2,3-Dihydrofuran rapidly reacts with Grubbs catalyst to form a thermodynamically stable Ru Fischer carbene-the only detectable active Ru species during copolymerization-and the addition of NBEs becomes rate determining. This reactivity attenuates the NBE homoaddition and allows uniform incorporation of acid-degradable enol ether linkages throughout the copolymers, which enables complete polymer degradation while maintaining the favourable characteristics of living ring-opening metathesis polymerization. Copolymerization of 2,3-dihydrofuran with NBEs gives low dispersity polymers with tunable solubility, glass transition temperature and mechanical properties. These polymers can be fully degraded into small molecule or oligomeric species under mildly acidic conditions. This method can be readily adapted to traditional ring-opening metathesis polymerization of widely used NBEs to synthesize easily degradable polymers with tunable properties for various applications and for environmental sustainability.
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24
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Yuan J, Giardino GJ, Niu J. Metathesis Cascade-Triggered Depolymerization of Enyne Self-Immolative Polymers*. Angew Chem Int Ed Engl 2021; 60:24800-24805. [PMID: 34453402 DOI: 10.1002/anie.202108239] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/27/2021] [Indexed: 11/10/2022]
Abstract
A novel class of enyne self-immolative polymers (SIPs) capable of metathesis cascade-triggered depolymerization is reported. Studies on model compounds established 1,6-enyne structures for efficient metathesis cascade reactions. SIPs incorporating the optimized 1,6-enyne motif were prepared via both polycondensation and iterative exponential growth approaches. These SIPs demonstrated excellent stability in strong acid, base, nucleophiles, or at elevated temperatures, and can undergo efficient and complete depolymerization once triggered by a metathesis catalyst. Further studies revealed that introducing a terminal alkene to the chain end of the enyne SIPs improved the depolymerization efficiency, and established their potential as stimuli-responsive materials.
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Affiliation(s)
- Jingsong Yuan
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Gavin J Giardino
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Jia Niu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
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25
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Yuan J, Giardino GJ, Niu J. Metathesis Cascade‐Triggered Depolymerization of Enyne Self‐Immolative Polymers**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jingsong Yuan
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | | | - Jia Niu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
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26
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Abstract
The development of degradable polymers has commanded significant attention over the past half century. Approaches have predominantly relied on ring-opening polymerization of cyclic esters (e.g., lactones, lactides) and N-carboxyanhydrides, as well as radical ring-opening polymerizations of cyclic ketene acetals. In recent years, there has been a significant effort applied to expand the family of degradable polymers accessible via olefin metathesis polymerization. Given the excellent functional group tolerance of olefin metathesis polymerization reactions generally, a broad range of conceivable degradable moieties can be incorporated into appropriate monomers and thus into polymer backbones. This approach has proven particularly versatile in synthesizing a broad spectrum of degradable polymers including poly(ester), poly(amino acid), poly(acetal), poly(carbonate), poly(phosphoester), poly(phosphoramidate), poly(enol ether), poly(azobenzene), poly(disulfide), poly(sulfonate ester), poly(silyl ether), and poly(oxazinone) among others. In this review, we will highlight the main olefin metathesis polymerization strategies that have been used to access degradable polymers, including (i) acyclic diene metathesis polymerization, (ii) entropy-driven and (iii) enthalpy-driven ring-opening metathesis polymerization, as well as (iv) cascade enyne metathesis polymerization. In addition, the livingness or control of polymerization reactions via different strategies are highlighted and compared. Potential applications, challenges and future perspectives of this new library of degradable polyolefins are discussed. It is clear from recent and accelerating developments in this field that olefin metathesis polymerization represents a powerful synthetic tool towards degradable polymers with novel structures and properties inaccessible by other polymerization approaches.
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Affiliation(s)
- Hao Sun
- Department of Chemistry, International Institute for
Nanotechnology, Northwestern University, Evanston, IL 60208, USA
| | - Yifei Liang
- Department of Chemistry, International Institute for
Nanotechnology, Northwestern University, Evanston, IL 60208, USA
| | - Matthew P. Thompson
- Department of Chemistry, International Institute for
Nanotechnology, Northwestern University, Evanston, IL 60208, USA
| | - Nathan C. Gianneschi
- Department of Chemistry, International Institute for
Nanotechnology, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science & Engineering,
Department of Biomedical Engineering, Department of Pharmacology, Chemistry of Life
Processes Institute, Northwestern University, Evanston, IL 60208, USA
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27
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Olefin metathesis-based chemically recyclable polymers enabled by fused-ring monomers. Nat Chem 2021; 13:743-750. [PMID: 34294914 DOI: 10.1038/s41557-021-00748-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 06/10/2021] [Indexed: 02/06/2023]
Abstract
A promising solution to address the challenges in plastics sustainability is to replace current polymers with chemically recyclable ones that can depolymerize into their constituent monomers to enable the circular use of materials. Despite some progress, few depolymerizable polymers exhibit the desirable thermal stability and strong mechanical properties of traditional polymers. Here we report a series of chemically recyclable polymers that show excellent thermal stability (decomposition temperature >370 °C) and tunable mechanical properties. The polymers are formed through ring-opening metathesis polymerization of cyclooctene with a trans-cyclobutane installed at the 5 and 6 positions. The additional ring converts the non-depolymerizable polycyclooctene into a depolymerizable polymer by reducing the ring strain energy in the monomer (from 8.2 kcal mol-1 in unsubstituted cyclooctene to 4.9 kcal mol-1 in the fused ring). The fused-ring monomer enables a broad scope of functionalities to be incorporated, providing access to chemically recyclable elastomers and plastics that show promise as next-generation sustainable materials.
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28
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29
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Subnaik S, Sheridan K, Hobbs CE. Ring Opening Metathesis Polymerization of a New Monomer Derived from a Nitroso Diels–Alder Reaction. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Selesha Subnaik
- Department of Chemistry Sam Houston State University Huntsville TX 77340 USA
| | - Katya Sheridan
- Department of Chemistry Sam Houston State University Huntsville TX 77340 USA
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30
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Yarolimek MR, Bookbinder HR, Coia BM, Kennemur JG. Ring-Opening Metathesis Polymerization of δ-Pinene: Well-Defined Polyolefins from Pine Sap. ACS Macro Lett 2021; 10:760-766. [PMID: 35549097 DOI: 10.1021/acsmacrolett.1c00284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Well-controlled ring-opening metathesis polymerization (ROMP) of δ-pinene is reported. The monomer is produced through a facile, metal-free, three-step synthesis from highly abundant and sustainable α-pinene. Using Grubbs third-generation catalyst, δ-pinene undergoes ROMP to high conversion (>95%) with molar mass up to 70 kg mol-1 and narrow dispersity (<1.2). A highly regioregular propagation mechanism was concluded by NMR spectroscopic analysis that revealed a head-to-tail (HT, >95%) microstructure and high trans content (>98%). Successful ROMP is corroborated with density functional theory calculations on δ-pinene's ring strain energy (∼35 kJ mol-1). Poly(δ-pinene) has a high glass transition temperature (∼104 °C) and a unique chiral microstructure bearing gem-dimethylcyclobutane rings. Controlled ROMP also allowed the synthesis of block copolymers containing segments of poly(δ-pinene) and polynorbornene which are discussed. Finally, bulk polymerization of δ-pinene is possible, indicating a greener approach to these materials, albeit with some loss of control.
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Affiliation(s)
- Mark R. Yarolimek
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Heather R. Bookbinder
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Brianna M. Coia
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Justin G. Kennemur
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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31
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Neary WJ, Sun Y, Moore JS. Selective Ring-Opening Allene Metathesis: Polymerization or Ruthenium Vinylidene Formation. ACS Macro Lett 2021; 10:642-648. [PMID: 35570762 DOI: 10.1021/acsmacrolett.1c00229] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Selective ring-opening allene metathesis polymerization (ROAlMP) and ruthenium vinylidene formation from 1,2-cyclononadiene (1) by simple catalyst selection are discussed. Grubbs second-generation catalyst (G2) favors the formation of an alkylidene leading to the ROAlMP of (1). Grubbs first-generation catalyst (G1) favors vinylidene formation and prevents the homopolymerization of (1) even at elevated temperatures. Isolation and characterization of poly(1) by NMR analysis and MALDI-TOF confirms the generation of a well-defined polyallene that exhibits good thermal stability (TD ca. 390 °C) and fluorescent properties. Ring-opening metathesis polymerization (ROMP) of a highly strained norbornene derivative (NBE-iPr) at 80 °C using the ruthenium vinylidene generated from (1) is also investigated. The discovery of ROAlMP allows for the simple access of well-defined polyallenes from commercially available catalysts and will ultimately guide structure-property determinations of polyallenes.
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Affiliation(s)
- William J. Neary
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Yunyan Sun
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jeffrey S. Moore
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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32
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Sonoda T, Kobayashi S, Tanaka M. Periodically Functionalized Linear Polyethylene with Tertiary Amino Groups via Regioselective Ring-Opening Metathesis Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Toshiki Sonoda
- Department of Chemistry and Biochemistry, Graduate School of Kyushu University, 744 Moto-oka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Shingo Kobayashi
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaru Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, CE41 744 Motooka,
Nishi-ku, Fukuoka 819-0395, Japan
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33
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Affiliation(s)
- Wesley S. Farrell
- Chemistry Department United States Naval Academy 572 M Holloway Rd. Annapolis MD 21402 USA
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34
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Jones BH, Staiger C, Powers J, Herman JA, Román-Kustas J. Selectively Depolymerizable Polyurethanes from Unsaturated Polyols Cleavable by Olefin Metathesis. Macromol Rapid Commun 2020; 42:e2000571. [PMID: 33300207 DOI: 10.1002/marc.202000571] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/10/2020] [Indexed: 12/14/2022]
Abstract
This communication describes a novel series of linear and crosslinked polyurethanes (PUs) and their selective depolymerization under mild conditions. Two unique polyols are synthesized bearing unsaturated units in a configuration designed to favor ring-closing metathesis (RCM) to five- and six-membered cycloalkenes. These polyols are co-polymerized with toluene diisocyanate to generate linear PUs and trifunctional hexamethylene- and diphenylmethane-based isocyanates to generate crosslinked PUs. The polyol design is such that the RCM reaction cleaves the backbone of the polymer chain. Upon exposure to dilute solutions of Grubbs' catalyst under ambient conditions, the PUs are rapidly depolymerized to low molecular weight, soluble products bearing vinyl and cycloalkene functionalities. These functionalities enable further re-polymerization by traditional strategies for polymerization of double bonds. It is anticipated that this general approach can be expanded to develop a range of chemically recyclable condensation polymers that are readily depolymerized by orthogonal metathesis chemistry.
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Affiliation(s)
- Brad H Jones
- Department of Organic Materials Science, Sandia National Laboratories, Albuquerque, NM, 87185, USA
| | - Chad Staiger
- Department of Photovoltaics and Materials Technology, Sandia National Laboratories, Albuquerque, NM, 87185, USA
| | - Jackson Powers
- Department of Organic Materials Science, Sandia National Laboratories, Albuquerque, NM, 87185, USA
| | - Jeremy A Herman
- Department of Organic Materials Science, Sandia National Laboratories, Albuquerque, NM, 87185, USA
| | - Jessica Román-Kustas
- Department of Materials Reliability, Sandia National Laboratories, Albuquerque, NM, 87185, USA
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35
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LaNasa JA, Hickey RJ. Surface-Initiated Ring-Opening Metathesis Polymerization: A Method for Synthesizing Polymer-Functionalized Nanoparticles Exhibiting Semicrystalline Properties and Diverse Macromolecular Architectures. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01381] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jacob A. LaNasa
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16801, United States
| | - Robert J. Hickey
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16801, United States
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16801, United States
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36
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Podiyanachari SK, Moncho S, Brothers EN, Al-Meer S, Al-Hashimi M, Bazzi HS. One-Pot Tandem Ring-Opening and Ring-Closing Metathesis Polymerization of Disubstituted Cyclopentenes Featuring a Terminal Alkyne Functionality. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | - Salvador Moncho
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Edward N. Brothers
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Saeed Al-Meer
- Central Laboratory Unit, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Mohammed Al-Hashimi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Hassan S. Bazzi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
- Department of Materials Science & Engineering, Texas A&M University, 209 Reed MacDonald Building, College Station, Texas 77843-3003, United States
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Morontsev A, Gringolts M, Lakhtin V, Finkelshtein E. Synthesis of high-molecular weight poly(1,1-dimethyl-1-silapentene) by olefin metathesis polymerization in the presence of Grubbs catalysts. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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López-Barrón CR, Rohde B, Zabula AV, Schaefer JJ, Throckmorton JA. Molecular Orientation and Strain-Induced Crystallization in trans-Polypentenamer. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Brian Rohde
- ExxonMobil Chemical Company, Baytown, Texas 77520, United States
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Abstract
Degradable polymers are desirable for the replacement of conventional organic polymers that persist in the environment, but they often suffer from the unintentional scission of the degradable functionalities on the polymer backbone, which diminishes polymer properties during storage and regular use. Herein, we report a strategy that combats unintended degradation in polymers by combining two common degradation stimuli-mechanical and acid triggers-in an "AND gate" fashion. A cyclobutane (CB) mechanophore is used as a mechanical gate to regulate an acid-sensitive ketal that has been widely employed in acid degradable polymers. This gated ketal is further incorporated into the polymer backbone. In the presence of an acid trigger alone, the pristine polymer retains its backbone integrity, and delivering high mechanical forces alone by ultrasonication degrades the polymer to an apparent limiting molecular weight of 28 kDa. The sequential treatment of ultrasonication followed by acid, however, leads to a further 11-fold decrease in molecular weight to 2.5 kDa. Experimental and computational evidence further indicate that the ungated ketal possesses mechanical strength that is commensurate with the conventional polymer backbones. Single molecule force spectroscopy (SMFS) reveals that the force necessary to activate the CB molecular gate on the time scale of 100 ms is approximately 2 nN.
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Affiliation(s)
- Yangju Lin
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
| | - Tatiana B Kouznetsova
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
| | - Stephen L Craig
- Department of Chemistry , Duke University , Durham , North Carolina 27708 , United States
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40
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Feist JD, Xia Y. Enol Ethers Are Effective Monomers for Ring-Opening Metathesis Polymerization: Synthesis of Degradable and Depolymerizable Poly(2,3-dihydrofuran). J Am Chem Soc 2020; 142:1186-1189. [PMID: 31880922 DOI: 10.1021/jacs.9b11834] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Enol ethers are widely used as quenching reagents for Grubbs catalysts. However, we report the surprisingly effective ring-opening metathesis polymerization (ROMP) of cyclic enol ethers, because the resulting electron-rich ruthenium alkylidene complex remains active toward metathesis of electron-rich olefins, despite its deactivation toward hydrocarbon olefins. We demonstrate the first example of ROMP of cyclic enol ethers, using 2,3-dihydrofuran as the monomer, producing a new type of degradable and depolymerizable poly(enol ether). The polymers exhibited perfect regioregularity, and their molecular weights can be regulated by the loading of Grubbs initiators or by the use of a linear vinyl ether as the chain transfer agent. We also developed protocols to deactivate the catalyst following metathesis of enol ethers and cleave the catalyst off the resulting polymers using H2O2 oxidation. The resulting poly(dihydrofuran) can be recycled to monomer via depolymerization with Grubbs catalyst or degraded to small molecules by hydrolysis under acidic conditions. This work opens exciting opportunities for a new class of ROMP monomers that lead to degradable polymers.
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Affiliation(s)
- John D Feist
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Yan Xia
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
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41
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Denisova YI, Roenko AV, Adzhieva OA, Gringolts ML, Shandryuk GA, Peregudov AS, Finkelshtein ES, Kudryavtsev YV. Facile synthesis of norbornene–ethylene–vinyl acetate/vinyl alcohol multiblock copolymers by the olefin cross-metathesis of polynorbornene with poly(5-acetoxy-1-octenylene). Polym Chem 2020. [DOI: 10.1039/d0py01167c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New norbornene−ethylene–vinyl acetate/vinyl alcohol multiblock copolymers are synthesized via the olefin cross-metathesis reaction of polynorbornene with poly(5-acetoxy-1-octenylene) followed by CC bond hydrogenation and acetoxy group deprotection.
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Affiliation(s)
- Yulia I. Denisova
- Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexey V. Roenko
- Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Olga A. Adzhieva
- Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Maria L. Gringolts
- Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Georgiy A. Shandryuk
- Topchiev Institute of Petrochemical Synthesis
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexander S. Peregudov
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
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42
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Affiliation(s)
- Dylan J. Walsh
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Michael G. Hyatt
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Susannah A. Miller
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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43
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Hyatt MG, Walsh DJ, Lord RL, Andino Martinez JG, Guironnet D. Mechanistic and Kinetic Studies of the Ring Opening Metathesis Polymerization of Norbornenyl Monomers by a Grubbs Third Generation Catalyst. J Am Chem Soc 2019; 141:17918-17925. [PMID: 31651157 DOI: 10.1021/jacs.9b09752] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The mechanism of ring-opening metathesis polymerization (ROMP) for a set of functionalized norbornenyl monomers initiated by a Grubbs third generation precatalyst [(H2IMes)(pyr)2(Cl)2Ru═CHPh] was investigated. Through a series of 12C/13C and 1H/2H kinetic isotope effect studies, the rate-determining step for the polymerization was determined to be the formation of the metallacyclobutane ring. This experimental result was further validated through DFT calculations showing that the highest energy transition state is metallacyclobutane formation. The effect of monomer stereochemistry (exo vs endo) of two types of ester substituted monomers was also investigated. Kinetic and spectroscopic evidence supporting the formation of a six-membered chelate through coordination of the proximal polymer ester to the Ru center is presented. This chelation and its impact on the rate of polymerization are shown to vary based on the monomer employed and its stereochemistry. The combination of this knowledge led to the derivation of a generic rate law describing the rate of polymerization of norbornene monomers initiated by a Grubbs third generation catalyst.
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Affiliation(s)
- Michael G Hyatt
- Department of Chemistry , University of Illinois Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Dylan J Walsh
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Richard L Lord
- Department of Chemistry , Grand Valley State University , Allendale , Michigan 49401 , United States
| | - José G Andino Martinez
- Department of Chemistry , University of Illinois Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , Urbana , Illinois 61801 , United States
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44
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Investigating the effects of bulky allylic substituents on the regioregularity and thermodynamics of ROMP on cyclopentene. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109251] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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45
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Neary WJ, Isais TA, Kennemur JG. Depolymerization of Bottlebrush Polypentenamers and Their Macromolecular Metamorphosis. J Am Chem Soc 2019; 141:14220-14229. [PMID: 31403783 DOI: 10.1021/jacs.9b05560] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The depolymerization of bottlebrush (BB) polymers with varying lengths of polycyclopentene (PCP) backbone and polystyrene (PS) grafts is investigated. In all cases, ring closing metathesis (RCM) depolymerization of the PCP BB backbone appears to occur through an end-to-end depolymerization mechanism as evidenced by size exclusion chromatography. Investigation on the RCM depolymerization of linear PCP reveals a more random chain degradation process. Quantitative depolymerization occurs under thermodynamic conditions (higher temperature and dilution) that drives RCM into cyclopentenes (CPs), each bearing one of the original PS grafts from the BB. Catalyst screening reveals Grubbs' third (G3) and second (G2) generation catalyst depolymerize BBs significantly faster than Grubbs' first generation (G1) and Hoveyda-Grubbs' second generation (HG2) catalyst under identical conditions while solvent (toluene versus CHCl3) plays a less significant role. The length of the BB backbone and PS side chains also play a minor role in depolymerization kinetics, which is discussed. The ability to completely deconstruct these BB architectures into linear grafts provides definitive insights toward the ATRP "grafting-from" mechanism originally used to construct the BBs. Core-shell BB block copolymers (BBCPs) are shown to quantitatively depolymerize into linear diblock polymer grafts. Finally, the complete depolymerization of BBs into α-cyclopentenyl-PS allows further transformation to other architectures, such as 3-arm stars, through thiol-ene coupling onto the CP end group. These unique materials open the door to stimuli-responsive reassembly of BBs and BBCPs into new morphologies driven by macromolecular metamorphosis.
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Affiliation(s)
- William J Neary
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
| | - Taylor A Isais
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
| | - Justin G Kennemur
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
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46
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Song K, Kim K, Hong D, Kim J, Heo CE, Kim HI, Hong SH. Highly active ruthenium metathesis catalysts enabling ring-opening metathesis polymerization of cyclopentadiene at low temperatures. Nat Commun 2019; 10:3860. [PMID: 31455772 PMCID: PMC6712042 DOI: 10.1038/s41467-019-11806-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 08/06/2019] [Indexed: 11/09/2022] Open
Abstract
Development of versatile ruthenium olefin-metathesis catalysts with high activity, stability, and selectivity is a continuous challenge. Here we report highly controllable ruthenium catalysts using readily accessible and versatile N-vinylsulfonamides as carbene precursors. Catalyst initiation rates were controlled in a straightforward manner, from latent to fast initiating, through the facile modulation of the N-vinylsulfonamide ligands. Trifluoromethanesulfonamide-based catalysts initiated ultrarapidly even at temperatures as low as -60 °C and continuously propagated rapidly, enabling the enthalpically and entropically less-favored ring-opening metathesis polymerizations of low-strained functionalized cyclopentene derivatives, some of which are not accessible with previous olefin-metathesis catalysts. To our surprise, the developed catalysts facilitated the polymerization of cyclopentadiene (CPD), a feedstock that is easily and commonly obtainable through the steam cracking of naphtha, which has, to the best of our knowledge, not been previously achieved due to its low ring strain and facile dimerization even at low temperatures (below 0 °C).
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Affiliation(s)
- Kitaek Song
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kunsoon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Daeun Hong
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jungwon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Chae Eun Heo
- Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
| | - Hugh I Kim
- Department of Chemistry, Korea University, Seoul, 02841, Republic of Korea
| | - Soon Hyeok Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
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