1
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Rheology of Poly(glycidyl methacrylate) Macromolecular Nano Assemblies. Polymers (Basel) 2022; 14:polym14030455. [PMID: 35160445 PMCID: PMC8839273 DOI: 10.3390/polym14030455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/04/2022] Open
Abstract
A recently reported combined polymerization process of glycidyl methacrylate, mediated by homometallic and heterobimetallic aluminium complexes, naturally produces nano-sized macromolecular assemblies. In this work, the morphological features and the rheological properties of these novel nanoassemblies are studied. The hydrodynamic sizes of the nanoparticles in the solution range from 10 to 40 nm (in numbers), but on a flat surface they adopt a characteristic thin disk shape. The dynamic moduli have been determined in a broad range of temperatures, and the time—temperature superposition applied to obtain master curves of the whole viscoelastic response from the glassy to the terminal regions. The fragility values obtained from the temperature dependence are of m ~40, typical of van de Waals liquids, suggesting a very effective packing of the macromolecular assemblies. The rheological master curves feature a characteristic viscoelastic relaxation with the absence of elastic intermediate plateau, indicating that the systems behaved as un-entangled polymers. The analysis of the linear viscoelastic fingerprint reveals a Zimm-like dynamics at intermediate frequencies typical of unentangled systems. This behaviour resembles that observed in highly functionalized stars, dendrimers, soft colloids and microgels.
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2
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Yoon H, Hinton ZR, Heinzman J, Chase CE, Gopinadhan M, Edmond KV, Ryan DJ, Smith SE, Alvarez NJ. The effect of pyrolysis on the chemical, thermal and rheological properties of pitch. SOFT MATTER 2021; 17:8925-8936. [PMID: 34546280 DOI: 10.1039/d1sm00594d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Pitch-based carbon fibers are of considerable interest as high-performance materials. There are reports over the last several decades detailing (i) methods of improving pitch-based carbon fiber performance, and (ii) reducing the cost of production via novel processing techniques. However, there remain considerable challenges in producing high-performance pitch-based carbon fibers consistently on an industrial scale. This is arguably due to the difficulty of scaling the melt-spinning process to compensate for variability in pitch feedstock quality and a lack of understanding of processing-structure-performance relationships. This work focuses on the early stages of heat treatment (pyrolysis) of isotropic pitch and its effect on the chemical, thermal, and rheological properties of the pitch, which help determine its processability. More specifically, we quantify significant changes in chemical structure, Mw, Tg, Ts, and shear and extensional rheology as a function of pyrolysis time at 400 °C. The extensional rheology, in particular, shows that the 'stretchability' of the pitch samples strongly depends on pyrolysis severity, and is important for characterizing 'drawability'. Using a novel analysis of the uniaxial stretching kinematics, we show an isothermal 'drawability window' that allows for the largest axial and radial Hencky strains at constant rate. We hypothesize that this extensional drawability window could facilitate the successful processing of pitch into high quality fiber, minimizing the trial-and-error approach currently used in the field.
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Affiliation(s)
- Heedong Yoon
- Chemical and Biological Engineering Department, Drexel University, 3141 Chestnut St., Philadelphia, PA, 19104, USA.
| | - Zachary R Hinton
- Chemical and Biological Engineering Department, Drexel University, 3141 Chestnut St., Philadelphia, PA, 19104, USA.
| | - James Heinzman
- Chemical and Biological Engineering Department, Drexel University, 3141 Chestnut St., Philadelphia, PA, 19104, USA.
| | - Clarence E Chase
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, NJ, 08801, USA
| | - Manesh Gopinadhan
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, NJ, 08801, USA
| | - Kazem V Edmond
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, NJ, 08801, USA
| | - Daniel J Ryan
- Analytical Sciences Laboratory, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, NJ, 08801, USA
| | - Stuart E Smith
- Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 Route 22 E., Annandale, NJ, 08801, USA
| | - Nicolas J Alvarez
- Chemical and Biological Engineering Department, Drexel University, 3141 Chestnut St., Philadelphia, PA, 19104, USA.
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3
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Yan ZC, Li Y, Guo Z, Shinohara A, Nakanishi T, Chen G, Pan C, Stadler FJ. Rheology of Conjugated Polymers with Bulky and Flexible Side Chains. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00044] [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)
- Zhi-Chao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Yanan Li
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Zhenfeng Guo
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Akira Shinohara
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Takashi Nakanishi
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Guangming Chen
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Chengjun Pan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Florian J. Stadler
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
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4
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Vereroudakis E, Bang KT, Karouzou M, Ananiadou A, Noh J, Choi TL, Loppinet B, Floudas G, Vlassopoulos D. Multi-scale Structure and Dynamics of Dendronized Polymers with Varying Generations. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emmanouil Vereroudakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | - Ki-Taek Bang
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Maria Karouzou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | | | - Jinkyung Noh
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Benoit Loppinet
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
| | - George Floudas
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH), 70013 Heraklion, Crete, Greece
- Department of Materials Science & Technology, University of Crete, 71003 Heraklion, Crete, Greece
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5
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Boyle BM, Collins JL, Mensch TE, Ryan MD, Newell BS, Miyake GM. Impact of Backbone Composition on Homopolymer Dynamics and Brush Block Copolymer Self-Assembly. Polym Chem 2020; 11:7147-7158. [PMID: 33456502 PMCID: PMC7805478 DOI: 10.1039/d0py01007c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four series of brush block copolymers (BBCP), with near identical side chain compositions but varying backbone structures, were synthesized to investigate the effect of backbone structure on the process of thermal BBCP self-assembly to photonic crystals (PCs). Each of the self-assembled PC films were examined by reflection measurements, small angle X-ray scattering measurements, and scanning electron microscopy to compare the resulting properties of the polymeric photonic crystal and the nanostructured morphology impacted by the backbone structure. It was found that the composition of the brush backbone within a BBCP has a dramatic effect on the ability of the BBCP to self-assemble into ordered nanostructures and on the local ordering of the nanostructure morphology accessed with higher molecular weight (MW) BBCPs (> 1,500 kg/mol). BBCPs with a norbornene imide-based backbone were able to thermally self-assemble to longer wavelength reflecting PCs and had higher fidelity ordering of lamellar nanostructures with higher MW polymers. By analyzing the melt rheological responses of the backbone compositions, both as linear polymers and homobrush polymers, it was concluded that the inherent fragility of the backbone promotes enhanced local ordering in the lamellar nanostructure morphology as well as access to larger domain sizes.
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Affiliation(s)
- Bret M. Boyle
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
| | - Joseph L. Collins
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
| | - Tara E. Mensch
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
| | - Matthew D. Ryan
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
| | - Brian S. Newell
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
| | - Garret M. Miyake
- Department of Chemistry, Colorado State University, Fort Collins, Colorado
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6
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Hassanpour F, Jalili K, Behboodpour L, Afkhami A. Microstructural Capture of Living Ultrathin Polymer Brush Evolution via Kinetic Simulation Studies. J Phys Chem B 2020; 124:9438-9455. [PMID: 32935990 DOI: 10.1021/acs.jpcb.0c04890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Performing dynamic off-lattice multicanonical Monte Carlo simulations, we study the statics, dynamics, and scission-recombination kinetics of a self-assembled in situ-polymerized polydisperse living polymer brush (LPB), designed by surface-initiated living polymerization. The living brush is initially grown from a two-dimensional substrate by end-monomer polymerization-depolymerization reactions through seeding of initiator arrays on the grafting plane which come in contact with a solution of nonbonded monomers under good solvent conditions. The polydispersity is shown to significantly deviate from the Flory-Schulz type for low temperatures because of pronounced diffusion limitation effects on the rate of the equilibration reaction. The self-avoiding chains take up fairly compact structures of typical size Rg(N) ∼ Nν in rigorously two-dimensional (d = 2) melt, with ν being the inverse fractal dimension (ν = 1/d). The Kratky description of the intramolecular structure factor F(q), in keeping with the concept of generalized Porod scattering from compact particles with fractal contour, discloses a robust nonmonotonic fashion with qdF(q) ∼ (qRg)-3/4 in the intermediate-q regime. It is found that the kinetics of LPB growth, given by the variation of the mean chain length, follows a power law ⟨N(t)⟩ ∝ t1/3 with elapsed time after the onset of polymerization, whereby the instantaneous molecular weight distribution (MWD) of the chains c(N) retains its functional form. The variation of ⟨N(t)⟩ during quenches of the LPB to different temperatures T can be described by a single master curve in units of dimensionless time t/τ∞, where τ∞ is the typical (final temperature T∞-dependent) relaxation time which is found to scale as τ∞ ∝ ⟨N(t = ∞)⟩5 with the ultimate average length of the chains. The equilibrium monomer density profile ϕ(z) of the LPB varies as ϕ(z) ∝ ϕ-α with the concentration of segments ϕ in the system and the probability distribution c(N) of chain lengths N in the brush layer scales as c(N) ∝ N-τ. The computed exponents α ≈ 0.64 and τ ≈ 1.70 are in good agreement with those predicted within the context of the Diffusion-Limited Aggregation theory, α = 2/3 and τ = 7/4.
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Affiliation(s)
- Fatemeh Hassanpour
- Department of Polymer Engineering, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran.,Institute of Polymeric Materials, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran
| | - Kiyumars Jalili
- Department of Polymer Engineering, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran.,Institute of Polymeric Materials, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran
| | - Leila Behboodpour
- Department of Polymer Engineering, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran.,Institute of Polymeric Materials, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran
| | - Ali Afkhami
- Department of Polymer Engineering, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran.,Institute of Polymeric Materials, Sahand University of Technology, New Town of Sahand, 5331817634 Tabriz, Iran
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7
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Galuska LA, McNutt WW, Qian Z, Zhang S, Weller DW, Dhakal S, King ER, Morgan SE, Azoulay JD, Mei J, Gu X. Impact of Backbone Rigidity on the Thermomechanical Properties of Semiconducting Polymers with Conjugation Break Spacers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00889] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Luke A. Galuska
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - William W. McNutt
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Zhiyuan Qian
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Song Zhang
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Daniel W. Weller
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Sujata Dhakal
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Eric R. King
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Sarah E. Morgan
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Jason D. Azoulay
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
| | - Jianguo Mei
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiaodan Gu
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
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8
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Wade MA, Walsh D, Lee JCW, Kelley E, Weigandt K, Guironnet D, Rogers SA. Color, structure, and rheology of a diblock bottlebrush copolymer solution. SOFT MATTER 2020; 16:4919-4931. [PMID: 32393953 PMCID: PMC11253116 DOI: 10.1039/d0sm00397b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A structure-property-process relation is established for a diblock bottlebrush copolymer solution, through a combination of rheo-neutron scattering, imaging, and rheological measurements. Polylactic acid-b-polystyrene diblock bottlebrush copolymers were dispersed in toluene with a concentration of 175 mg ml-1, where they self-assembled into a lamellar phase. All measurements were carried out at 5 °C. The solution color, as observed in reflection, is shown to be a function of the shear rate. Under equilibrium and near-equilibrium conditions, the solution has a green color. At low shear rates the solution remains green, while at intermediate rates the solution is cyan. At the highest rates applied the solution is indigo. The lamellar spacing is shown to be a decreasing function of shear rate, partially accounting for the color change. The lamellae are oriented 'face-on' with the wall under quiescence and low shear rates, while a switch to 'edge-on' is observed at the highest shear rates, where the reflected color disappears. The intramolecular distance between bottlebrush polymers does not change with shear rate, although at high shear rates, the bottlebrush polymers are preferentially aligned in the vorticity direction within the lamellae. We therefore form a consistent relation between structure and function, spanning a wide range of length scales and shear rates.
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Affiliation(s)
- Matthew A Wade
- Chemical and Biomolecular Engineering Department, University of Illinois at Urbana-Champaign, 607 S Mathews Ave, Urbana, Illinois, USA.
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9
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Alexandris S, Peponaki K, Petropoulou P, Sakellariou G, Vlassopoulos D. Linear Viscoelastic Response of Unentangled Polystyrene Bottlebrushes. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00266] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stelios Alexandris
- Institute of Electronic Structure and Laser, FORTH, Heraklion 700 13, Crete, Greece
| | - Katerina Peponaki
- Institute of Electronic Structure and Laser, FORTH, Heraklion 700 13, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 700 13, Crete, Greece
| | - Paraskevi Petropoulou
- Department of Chemistry, National and Kapodistrian University of Athens, Athens 15784, Greece
| | - Georgios Sakellariou
- Department of Chemistry, National and Kapodistrian University of Athens, Athens 15784, Greece
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, FORTH, Heraklion 700 13, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 700 13, Crete, Greece
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10
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Sarapas JM, Martin TB, Chremos A, Douglas JF, Beers KL. Bottlebrush polymers in the melt and polyelectrolytes in solution share common structural features. Proc Natl Acad Sci U S A 2020; 117:5168-5175. [PMID: 32094183 PMCID: PMC7071916 DOI: 10.1073/pnas.1916362117] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Uncharged bottlebrush polymer melts and highly charged polyelectrolytes in solution exhibit correlation peaks in scattering measurements and simulations. Given the striking superficial similarities of these scattering features, there may be a deeper structural interrelationship in these chemically different classes of materials. Correspondingly, we constructed a library of isotopically labeled bottlebrush molecules and measured the bottlebrush correlation peak position [Formula: see text] by neutron scattering and in simulations. We find that the correlation length scales with the backbone concentration, [Formula: see text], in striking accord with the scaling of ξ with polymer concentration cP in semidilute polyelectrolyte solutions [Formula: see text] The bottlebrush correlation peak broadens with decreasing grafting density, similar to increasing salt concentration in polyelectrolyte solutions. ξ also scales with sidechain length to a power in the range of 0.35-0.44, suggesting that the sidechains are relatively collapsed in comparison to the bristlelike configurations often imagined for bottlebrush polymers.
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Affiliation(s)
- Joel M Sarapas
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Tyler B Martin
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Alexandros Chremos
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Jack F Douglas
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
| | - Kathryn L Beers
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899
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11
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Liu X, Liu F, Liu W, Gu H. ROMP and MCP as Versatile and Forceful Tools to Fabricate Dendronized Polymers for Functional Applications. POLYM REV 2020. [DOI: 10.1080/15583724.2020.1723022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiong Liu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, China
| | - Fangfei Liu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, China
| | - Wentao Liu
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, China
| | - Haibin Gu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, China
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12
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Re-visiting the “consequences of grafting density on the linear viscoelastic behavior of graft polymers”. POLYMER 2020. [DOI: 10.1016/j.polymer.2019.121992] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Golkaram M, Loos K. A Critical Approach to Polymer Dynamics in Supramolecular Polymers. Macromolecules 2019; 52:9427-9444. [PMID: 31894159 PMCID: PMC6933822 DOI: 10.1021/acs.macromol.9b02085] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 12/01/2019] [Indexed: 12/15/2022]
Abstract
Over the past few years, the concurrent (1) development of polymer synthesis and (2) introduction of new mathematical models for polymer dynamics have evolved the classical framework for polymer dynamics once established by Doi-Edwards/de Gennes. Although the analysis of supramolecular polymer dynamics based on linear rheology has improved a lot recently, there are a large number of insecurities behind the conclusions, which originate from the complexity of these novel systems. The interdependent effect of supramolecular entities (stickers) and chain dynamics can be overwhelming depending on the type and location of stickers as well as the architecture and chemistry of polymers. This Perspective illustrates these parameters and strives to determine what is still missing and has to be improved in the future works.
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Affiliation(s)
- Milad Golkaram
- Macromolecular Chemistry
and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Katja Loos
- Macromolecular Chemistry
and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
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14
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Qian Z, Galuska L, McNutt WW, Ocheje MU, He Y, Cao Z, Zhang S, Xu J, Hong K, Goodman RB, Rondeau‐Gagné S, Mei J, Gu X. Challenge and Solution of Characterizing Glass Transition Temperature for Conjugated Polymers by Differential Scanning Calorimetry. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24889] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Zhiyuan Qian
- School of Polymer Science and Engineering, Center for Optoelectronic Materials and DevicesThe University of Southern Mississippi Hattiesburg Mississippi 39406
| | - Luke Galuska
- School of Polymer Science and Engineering, Center for Optoelectronic Materials and DevicesThe University of Southern Mississippi Hattiesburg Mississippi 39406
| | - William W. McNutt
- Department of ChemistryPurdue University West Lafayette Indiana 47907
| | - Michael U. Ocheje
- Department of Chemistry and BiochemistryUniversity of Windsor Windsor N9B3P4 Ontario Canada
| | - Youjun He
- Center for Nanophase Materials SciencesOak Ridge National Laboratory Oak Ridge Tennessee 37831
| | - Zhiqiang Cao
- School of Polymer Science and Engineering, Center for Optoelectronic Materials and DevicesThe University of Southern Mississippi Hattiesburg Mississippi 39406
| | - Song Zhang
- School of Polymer Science and Engineering, Center for Optoelectronic Materials and DevicesThe University of Southern Mississippi Hattiesburg Mississippi 39406
| | - Jie Xu
- Naonotechnology and Science DivisionArgonne National Laboratory Lemont Illinois 60439
| | - Kunlun Hong
- Center for Nanophase Materials SciencesOak Ridge National Laboratory Oak Ridge Tennessee 37831
- Department of Chemical and Biomolecular EngineeringUniversity of Tennessee Knoxville Tennessee 37996
| | - Renée B. Goodman
- Department of Chemistry and BiochemistryUniversity of Windsor Windsor N9B3P4 Ontario Canada
| | - Simon Rondeau‐Gagné
- Department of Chemistry and BiochemistryUniversity of Windsor Windsor N9B3P4 Ontario Canada
| | - Jianguo Mei
- Department of ChemistryPurdue University West Lafayette Indiana 47907
| | - Xiaodan Gu
- School of Polymer Science and Engineering, Center for Optoelectronic Materials and DevicesThe University of Southern Mississippi Hattiesburg Mississippi 39406
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15
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Liang H, Grest GS, Dobrynin AV. Brush-Like Polymers and Entanglements: From Linear Chains to Filaments. ACS Macro Lett 2019; 8:1328-1333. [PMID: 35651163 DOI: 10.1021/acsmacrolett.9b00519] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dynamics of melts and solutions of high molecular weight polymers and biopolymers is controlled by topological constraints (entanglements) imposing a sliding chain motion along an effective confining tube. For linear chains, the tube size is determined by universal packing number Pe, the number of polymer strands within a confining tube that is required for chains to entangle. Here we show that in melts of brush-like (graft) polymers, consisting of linear chain backbones with grafted side chains, Pe is not a universal number and depends on the molecular architecture. In particular, we use coarse-grained molecular dynamics simulations to demonstrate that the packing number is a nonmonotonic function of the ratio Rnsc/Rng of the size of the side chains Rnsc to that of the backbone spacer between neighboring grafting points Rng. This parameter characterizes the degree of mutual interpenetration between side chains of the same macromolecule. We show that Pe of brush-like polymers first decreases with increasing side chain grafting density in the dilute side chain regime (Rnsc < Rng), then begins to increase in the regime of overlapping side chains (Rnsc > Rng), approaching the value for linear chains in the limit of densely grafted side chains. This dependence of the packing number reflects a crossover from chain-like entanglements in systems with loosely grafted side chains (comb-like polymers) to entanglements between flexible filaments (bottlebrush-like polymers). Our simulation results are in agreement with the experimental data for the dependence of a plateau modulus on the molecular architecture of graft poly(n-butyl acrylates) and poly(norbornene)-graft-poly(lactide) melts.
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Affiliation(s)
- Heyi Liang
- Department of Polymer Science, University of Akron, Akron, Ohio 44325, United States
| | - Gary S. Grest
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Andrey V. Dobrynin
- Department of Polymer Science, University of Akron, Akron, Ohio 44325, United States
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16
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Costanzo S, Scherz L, Floudas G, Pasquino R, Kröger M, Schlüter AD, Vlassopoulos D. Hybrid Dendronized Polymers as Molecular Objects: Viscoelastic Properties in the Melt. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Salvatore Costanzo
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, Heraklion 70013, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 71003, Crete, Greece
- DICMAPI, University of Naples, P.le Tecchio 80, Naples 80125, Italy
| | - Leon Scherz
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - George Floudas
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Rossana Pasquino
- DICMAPI, University of Naples, P.le Tecchio 80, Naples 80125, Italy
| | - Martin Kröger
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - A. Dieter Schlüter
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, Heraklion 70013, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 71003, Crete, Greece
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17
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Dutertre F, Bang KT, Vereroudakis E, Loppinet B, Yang S, Kang SY, Fytas G, Choi TL. Conformation of Tunable Nanocylinders: Up to Sixth-Generation Dendronized Polymers via Graft-Through Approach by ROMP. Macromolecules 2019; 52:3342-3350. [PMID: 31496546 PMCID: PMC6727591 DOI: 10.1021/acs.macromol.9b00457] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/05/2019] [Indexed: 01/06/2023]
Abstract
Well-defined dendronized polymers (denpols) bearing high-generation dendron are attractive nano-objects as high persistency provides distinct properties, contrast to the random coiled linear polymers However, their syntheses via graft-through approach have been very challenging due to their structural complexity and steric hindrance retarding polymerization. Here, we report the first example of the synthesis of poly(norbornene) (PNB) containing ester dendrons up to the sixth generation (G6) by ring-opening metathesis polymerization. This is the highest generation ever polymerized among dendronized polymers prepared by graft-through approach, producing denpols with molecular weight up to 1960 kg/mol. Combination of size-exclusion chromatography, light scattering, and neutron scattering allowed a thorough structural study of these large denpols in dilute solution. A semiflexible cylinder model was successfully applied to represent both the static and dynamic experimental quantities yielding persistent length (l p), cross-sectional radius (R cs), and contour length (L). The denpol persistency seemed to increase with generation, with l p reaching 27 nm (Kuhn length 54 nm) for PNB-G6, demonstrating a rod-like conformation. Poly(endo-tricycle[4.2.2.0]deca-3,9-diene) (PTD) denpols exhibited larger persistency than the PNB analogues of the same generation presumably due to the higher grafting density of the PTD denpols. As the dendritic side chains introduce shape anisotropy into the denpol backbone, future work will entail a study of these systems in the concentrated solutions and melts.
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Affiliation(s)
- Fabien Dutertre
- Institute
of Electronic Structure and Laser, FO.R.T.H, PO Box 1527, 71110 Heraklion, Greece
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K.
| | - Ki-Taek Bang
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Emmanouil Vereroudakis
- Institute
of Electronic Structure and Laser, FO.R.T.H, PO Box 1527, 71110 Heraklion, Greece
- Department
of Materials Science & Technology, University
of Crete, 71003 Heraklion, Crete, Greece
| | - Benoit Loppinet
- Institute
of Electronic Structure and Laser, FO.R.T.H, PO Box 1527, 71110 Heraklion, Greece
| | - Sanghee Yang
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Sung-Yun Kang
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
| | - George Fytas
- Institute
of Electronic Structure and Laser, FO.R.T.H, PO Box 1527, 71110 Heraklion, Greece
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tae-Lim Choi
- Department
of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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18
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Boyle BM, Heinz O, Miyake GM, Ding Y. Impact of the Pendant Group on the Chain Conformation and Bulk Properties of Norbornene Imide-Based Polymers. Macromolecules 2019; 52:3426-3434. [PMID: 32773888 PMCID: PMC7413623 DOI: 10.1021/acs.macromol.9b00020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Three series of well-defined norbornene imide-based polymers with different pendant groups were synthesized to investigate the effect of the pendant group on the polymer conformation in solution and bulk melt properties. Each of these three series was examined by analyzing the polymers' bulk z-average radius of gyration via static light scattering and the polymers' melt viscoelastic properties via oscillatory measurements and differential scanning calorimetry. Sterically bulky pendant wedge groups modestly increase the rodlike conformation of the norbornene-imide polymer, however, the inherent rigidity of the polymer main-chain can still be observed with less bulky substituents. In stark contrast, the different side groups significantly impacted the bulk viscoelastic and thermal properties. By increasing the pendant group size, the chain diameter of the polymer increases and lowers the entanglement modulus. Finally, as the wedge pendant group size increases, the segmental relaxation time and the fragility index of these norbornene-based polymers are decreased.
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Affiliation(s)
- Bret M. Boyle
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ozge Heinz
- Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - Garret M. Miyake
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Yifu Ding
- Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, United States
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19
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Qian Z, Cao Z, Galuska L, Zhang S, Xu J, Gu X. Glass Transition Phenomenon for Conjugated Polymers. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900062] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhiyuan Qian
- School of Polymer Science and Engineering Center for Optoelectronic Materials and Device The University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Zhiqiang Cao
- School of Polymer Science and Engineering Center for Optoelectronic Materials and Device The University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Luke Galuska
- School of Polymer Science and Engineering Center for Optoelectronic Materials and Device The University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Song Zhang
- School of Polymer Science and Engineering Center for Optoelectronic Materials and Device The University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Jie Xu
- Argonne National Laboratory Lemont IL 60439 USA
| | - Xiaodan Gu
- School of Polymer Science and Engineering Center for Optoelectronic Materials and Device The University of Southern Mississippi Hattiesburg MS 39406 USA
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