1
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D'Anania O, De Rosa C, Talarico G. A Computational Evaluation of the Steric and Electronic Contributions in Stereoselective Olefin Polymerization with Pyridylamido-Type Catalysts. Molecules 2023; 28:molecules28093768. [PMID: 37175175 PMCID: PMC10180424 DOI: 10.3390/molecules28093768] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
A density functional theory (DFT) study combined with the steric maps of buried volume (%VBur) as molecular descriptors and an energy decomposition analysis through the ASM (activation strain model)-NEDA (natural energy decomposition analysis) approach were applied to investigate the origins of stereoselectivity for propene polymerization promoted by pyridylamido-type nonmetallocene systems. The relationships between the fine tuning of the ligand and the propene stereoregularity were rationalized (e.g., the metallacycle size, chemical nature of the bridge, and substituents at the ortho-position on the aniline moieties). The DFT calculations and %VBur steric maps reproduced the experimental trend: substituents on the bridge and on the ortho-positions of aniline fragments enhance the stereoselectivity. The ASM-NEDA analysis enabled the separation of the steric and electronic effects and revealed how subtle ligand modification may affect the stereoselectivity of the process.
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Affiliation(s)
- Olga D'Anania
- Scuola Superiore Meridionale, Largo San Marcellino, 80138 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, 80124 Napoli, Italy
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, 80124 Napoli, Italy
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2
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Scoti M, De Stefano F, Di Girolamo R, Malafronte A, Talarico G, De Rosa C. Crystallization Behavior and Properties of Propylene/4-Methyl-1-pentene Copolymers from a Metallocene Catalyst. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Miriam Scoti
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
| | - Fabio De Stefano
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
| | - Rocco Di Girolamo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
| | - Anna Malafronte
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I, 80126 Napoli, Italy
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3
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Han M, Zhao Y, Luo S, Fan X, He A. Diffusion controlled stereoregular polymerization in granule reactors - Reaction kinetic of Pr/Bt sequence polymerization with TiCl4/MgCl2 Ziegler-Natta catalyst. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4
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Yuan Y, Li W, Qv C, Ma Z. Crystallization and phase transition of butene/propylene copolymers. CrystEngComm 2023. [DOI: 10.1039/d3ce00008g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
The introduction of propylene co-units into butene/propylene random copolymers can accelerate the II–I phase transition and even induce the direct formation of trigonal form I′ from an amorphous melt.
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Affiliation(s)
- Yaru Yuan
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Wei Li
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Chunjing Qv
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Zhe Ma
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
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5
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Crystallization Behavior of Isotactic Propene-Octene Random Copolymers. Polymers (Basel) 2022; 14:polym14194032. [PMID: 36235980 PMCID: PMC9572639 DOI: 10.3390/polym14194032] [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: 08/19/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
The crystallization behavior of random propene-octene isotactic copolymers (iPPC8) prepared with a homogeneous metallocene catalyst has been studied. Samples of iPPC8 with low octene content up to about 7 mol% were isothermally crystallized from the melt at various crystallization temperatures. The samples crystallize in mixtures of the α and γ forms of isotactic polypropylene (iPP). The relative amount of γ form increases with increasing crystallization temperature, and a maximum amount of γ form (fγ(max)) is achieved for each sample. The crystallization behavior of iPPC8 copolymers is compared with the crystallization from the melt of propene–ethylene, propene–butene, propene–pentene, and propene–hexene copolymers. The results show that the behavior of iPPC8 copolymers is completely different from those described in the literature for the other copolymers of iPP. In fact, the maximum amount of γ form achieved in samples of different copolymers of iPP generally increases with increasing comonomer content, while in iPPC8 copolymers the maximum amount of γ form decreases with increasing octene content. The different behaviors are discussed based on the inclusion of co-monomeric units in the crystals of α and γ forms of iPP or their exclusion from the crystals. In iPPC8 copolymers, octene units are excluded from the crystals giving only the interruption effect that shortens the length of regular propene sequences, inducing crystallization of the γ form at low octene concentrations, lower than 2 mol%. At higher octene concentration, the crystallization of the kinetically favored α form prevails.
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6
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Melt-Crystallizations of α and γ Forms of Isotactic Polypropylene in Propene-Butene Copolymers. Polymers (Basel) 2022; 14:polym14183873. [PMID: 36146019 PMCID: PMC9500696 DOI: 10.3390/polym14183873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 09/11/2022] [Accepted: 09/13/2022] [Indexed: 11/23/2022] Open
Abstract
Random isotactic propene-butene copolymers (iPPC4) of different stereoregularity have been synthesized with three different homogeneous single center metallocene catalysts having different stereoselectivity. All samples crystallize from the polymerization solution in mixtures of α and γ forms, and the relative amount of γ form increases with increasing concentrations of butene and of rr stereodefects. All samples crystallize from the melt in mixtures of α and γ forms and the fraction of γ form increases with decreasing cooling rate. At high cooling rates, the crystallization of the α form is always favored, even for samples that contain high total concentration of defects that should crystallize in the γ form. The results demonstrate that in iPPs containing significant concentrations of defects, such as stereodefects and comonomeric units, the γ form is the thermodynamically stable form of iPP and crystallizes in selective conditions of very slow crystallization, whereas the α form is the kinetically favored form and crystallizes in conditions of fast crystallization.
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7
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Romano E, Budzelaar PHM, De Rosa C, Talarico G. Unconventional Stereoerror Formation Mechanisms in Nonmetallocene Propene Polymerization Systems Revealed by DFT Calculations. J Phys Chem A 2022; 126:6203-6209. [PMID: 36054494 PMCID: PMC9483984 DOI: 10.1021/acs.jpca.2c04935] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
An unconventional
mechanism for the stereoerror formation in propene
polymerization catalyzed by C1-symmetric
salalen-M systems (M = Zr, Hf) is suggested by DFT calculations. While
propagation happens with the ligand in its fac-mer conformation, a change of ligand wrapping mode from fac-mer to fac-fac is the main source of the lower stereoselectivities
obtained with Zr and Hf. This is different for the Ti analogues, where
the ligand fac-mer wrapping mode
does not play a role. Activation strain analysis indicates that the
preference for a chain stationary mechanism of the Zr/Hf species is
due to the energy required to distort the reactants (ΔEStrain) rather than to their mutual interaction
(ΔEInt).
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Affiliation(s)
- Eugenio Romano
- Scuola Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy
| | - Peter H M Budzelaar
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
| | - Giovanni Talarico
- Scuola Superiore Meridionale, Largo San Marcellino 10, 80138 Napoli, Italy.,Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
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Di Girolamo R, Cicolella A, Talarico G, Scoti M, De Stefano F, Giordano A, Malafronte A, De Rosa C. Structure and Morphology of Crystalline Syndiotactic Polypropylene-Polyethylene Block Copolymers. Polymers (Basel) 2022; 14:polym14081534. [PMID: 35458284 PMCID: PMC9031856 DOI: 10.3390/polym14081534] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 02/05/2023] Open
Abstract
A study of the structure and morphology of diblock copolymers composed of crystallizable blocks of polyethylene (PE) and syndiotactic polypropylene (sPP) having different lengths is reported. In both analyzed samples, the PE block crystallizes first by cooling from the melt (at 130 °C) and the sPP block crystallizes after at a lower temperature. Small angle X-ray scattering (SAXS) recorded during cooling showed three correlation peaks at values of the scattering vector, q1 = 0.12 nm−1, q2 = 0.24 nm−1 and q3 = 0.4 nm−1, indicating development of a lamellar morphology, where lamellar domains of PE and sPP alternate, each domain containing stacks of crystalline lamellae of PE or sPP sandwiched by their own amorphous phase of PE or sPP. At temperatures higher than 120 °C, when only PE crystals are formed, the morphology is defined by the formation of stacks of PE lamellae (17 nm thick) alternating with amorphous layers and with a long period of nearly 52 nm. At lower temperatures, when crystals of sPP are also well-formed, the morphology is more complex. A model of the morphology at room temperature is proposed based on the correlation distances determined from the self-correlation functions extracted from the SAXS data. Lamellar domains of PE (41.5 nm thick) and sPP (8.2 nm thick) alternate, each domain containing stacks of crystalline lamellae sandwiched by their own amorphous phase, forming a global morphology having a total lamellar periodicity of 49.7 nm, characterized by alternating amorphous and crystalline layers, where the crystalline layers are alternatively made of stacks of PE lamellae (22 nm thick) and thinner sPP lamellae (only 3.5 nm thick).
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9
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Scoti M, De Stefano F, Di Girolamo R, Talarico G, Malafronte A, De Rosa C. Crystallization of Propene–Pentene Isotactic Copolymers as an Indicator of the General View of the Crystallization Behavior of Isotactic Polypropylene. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01877] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Miriam Scoti
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Fabio De Stefano
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Rocco Di Girolamo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Anna Malafronte
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, Via Cintia, I-80126 Napoli, Italy
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10
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Urciuoli G, Vittoria A, Talarico G, Luise D, De Rosa C, Busico V, Cipullo R, Ruiz de Ballesteros O, Auriemma F. In-Depth Analysis of the Nonuniform Chain Microstructure of Multiblock Copolymers from Chain-Shuttling Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01824] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gaia Urciuoli
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Antonio Vittoria
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Davide Luise
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Odda Ruiz de Ballesteros
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Finizia Auriemma
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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11
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Lou Y, Liu L, Li W, Zhao R, Ma Z. Regulating Two Distinct Formation Pathways of the Thermodynamically Stable Phase to Tune Crystal Polymorphism: The Case of Butene/Pentene Copolymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yahui Lou
- Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
| | - Long Liu
- Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
| | - Wei Li
- Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
| | - Ruijun Zhao
- Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
| | - Zhe Ma
- Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P.R. China
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12
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Scoti M, Di Girolamo R, Giusto G, De Stefano F, Auriemma F, Malafronte A, Talarico G, De Rosa C. Mechanical Properties and Elastic Behavior of Copolymers of Syndiotactic Polypropylene with 1-Hexene and 1-Octene. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miriam Scoti
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Rocco Di Girolamo
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Giovangiuseppe Giusto
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Fabio De Stefano
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Finizia Auriemma
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Anna Malafronte
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Monte S.Angelo, Via Cintia, 80126 Napoli, Italy
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13
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Li T, Liu L, Lou Y, Li W, Ma G, Ma Z. Phase transition of polybutene-1 ionomers: Influences of ion content and branch length. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123861] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Shi L, Liu W, Xue Y, Hong M, Ji X. Influence of isothermal crystallization temperature on the temperature rising elution fractionation for a poly(1-butene-co-ethylene) resin. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Ruiz de Ballesteros O, Auriemma F, Di Girolamo R, Malafronte A, Scoti M, De Rosa C. Mechanical properties of isotactic 1-butene-ethylene copolymers from Ziegler-Natta catalyst. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Scoti M, Di Girolamo R, De Stefano F, Giordano A, Malafronte A, Talarico G, Cipullo R, De Rosa C. Synthesis, structure and properties of copolymers of syndiotactic polypropylene with 1-hexene and 1-octene. Polym Chem 2021. [DOI: 10.1039/d1py00975c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Incorporation of long branches, such as 1-hexene or 1-octene, in syndiotactic polypropylene gives novel elastomeric materials, whose crystallization behavior and elastic properties can be easily tailored through tuning of the branches concentration.
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Affiliation(s)
- Miriam Scoti
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Rocco Di Girolamo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Fabio De Stefano
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Angelo Giordano
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Anna Malafronte
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Giovanni Talarico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
| | - Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli, Italy
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17
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Liu L, Chu Z, Liao Y, Ma Z, Li Y. Flow-Induced Crystallization in Butene-1/1,5-Hexadiene Copolymers: Mutual Effects of Molecular Factor and Flow Stimuli. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01318] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Long Liu
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Zhaozhe Chu
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Yilong Liao
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Zhe Ma
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
| | - Yuesheng Li
- Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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18
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Yu Y, McKenna TFL, Boisson C, Lacerda Miranda MS, Martins O. Engineering Poly(ethylene-co-1-butene) through Modulating the Active Species by Alkylaluminum. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01712] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Yu
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire Chimie, Catalyse, Polymères et Procédés (C2P2), Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Timothy F. L. McKenna
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire Chimie, Catalyse, Polymères et Procédés (C2P2), Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Christophe Boisson
- Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire Chimie, Catalyse, Polymères et Procédés (C2P2), Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | | | - Olavo Martins
- Braskem SA, Global Catalysis, I&T E&P, 95853-000 Triunfo, Brazil
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19
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Ruiz de Ballesteros O, De Rosa C, Auriemma F, Malafronte A, Di Girolamo R, Scoti M. Polymorphism and form II – form I transformation in Ziegler-Natta isotactic 1-butene-ethylene copolymers having a multiblock molecular structure. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122460] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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De Rosa C, Scoti M, Ruiz de Ballesteros O, Di Girolamo R, Auriemma F, Malafronte A. Propylene–Butene Copolymers: Tailoring Mechanical Properties from Isotactic Polypropylene to Polybutene. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00842] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claudio De Rosa
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
| | - Miriam Scoti
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
| | - Odda Ruiz de Ballesteros
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
| | - Rocco Di Girolamo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
| | - Finizia Auriemma
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
| | - Anna Malafronte
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Monte S.Angelo, via Cintia, 80126 Napoli, Italy
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Kumawat J, Gupta VK. Fundamental aspects of heterogeneous Ziegler–Natta olefin polymerization catalysis: an experimental and computational overview. Polym Chem 2020. [DOI: 10.1039/d0py00753f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using an internal/external donor containing MgCl2-supported Ziegler–Natta catalyst is one of the important processes for polyolefin production.
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Affiliation(s)
- Jugal Kumawat
- Polymer Synthesis & Catalysis Group
- Reliance Research and Development Center
- Reliance Industries Limited
- Navi Mumbai-400701
- India
| | - Virendra Kumar Gupta
- Polymer Synthesis & Catalysis Group
- Reliance Research and Development Center
- Reliance Industries Limited
- Navi Mumbai-400701
- India
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