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Zhang Z, Kang X, Jiang Y, Cai Z, Li S, Cui D. Access to Disentangled Ultrahigh Molecular Weight Polyethylene via a Binuclear Synergic Effect. Angew Chem Int Ed Engl 2023; 62:e202215582. [PMID: 36418237 DOI: 10.1002/anie.202215582] [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: 10/24/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/25/2022]
Abstract
Disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE) has excellent processability but can be achieved under extreme conditions. Herein, we report ethylene polymerization with the binuclear half-sandwich scandium complexes C1-Sc2 and C2-Sc2 to afford UHMWPE. C1-Sc2 bearing a short linker shows higher activity and gives higher molecular weight PEs than C2-Sc2 containing a flexible spacer and the mononuclear Sc1 . Strikingly, all UHMWPEs isolated from C1-Sc2 under broad temperature range (25-120 °C) and wide ethylene pressures (2-13 bar) feature very low degree of entanglement as proved by rheological test, DSC annealing study and SEM. These dis-UHMWPEs are facilely mediated solid-state-process at 130 °C and their tensile strength and modulus reach up to 149.2 MPa and 1.5 GPa, respectively. DFT simulations reveal that the formation of dis-UHMWPE is attributed to the binuclear synergic effect and the agostic interaction between the active center and the growing chain.
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Affiliation(s)
- Zhen Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,Department of Materials Science and Engineering, Jilin University, 130022, Changchun, China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, 116044, Dalian, China
| | - Yang Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
| | - Zhongyi Cai
- Department of Materials Science and Engineering, Jilin University, 130022, Changchun, China
| | - Shihui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, Changchun, China.,School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026, Hefei, China
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Wu SL, Qiao J, Guan J, Chen HM, Wang T, Wang C, Wang Y. Nascent disentangled UHMWPE: Origin, synthesis, processing, performances and applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Baulu N, Langlais M, Dugas P, Thuilliez J, Jean‐Baptiste‐dit‐Dominique F, Lansalot M, Boisson C, D'Agosto F. Ethylene‐Coordinative Chain‐Transfer Polymerization‐Induced Self‐Assembly (CCTPISA). Chemistry 2022; 28:e202202089. [DOI: 10.1002/chem.202202089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Nicolas Baulu
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
- Manufacture des pneumatiques Michelin 23 Place des Carmes Dechaux 63040 Clermont-Ferrand France
| | - Marvin Langlais
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
- ChemistLab Michelin CP2M ICBMS joint Laboratory 43 Bd du 11 Nov. 1918 69616 Villeurbanne France
| | - Pierre‐Yves Dugas
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
| | - Julien Thuilliez
- Manufacture des pneumatiques Michelin 23 Place des Carmes Dechaux 63040 Clermont-Ferrand France
| | - François Jean‐Baptiste‐dit‐Dominique
- Manufacture des pneumatiques Michelin 23 Place des Carmes Dechaux 63040 Clermont-Ferrand France
- ChemistLab Michelin CP2M ICBMS joint Laboratory 43 Bd du 11 Nov. 1918 69616 Villeurbanne France
| | - Muriel Lansalot
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
| | - Christophe Boisson
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
- ChemistLab Michelin CP2M ICBMS joint Laboratory 43 Bd du 11 Nov. 1918 69616 Villeurbanne France
| | - Franck D'Agosto
- Université Lyon 1 CPE Lyon CNRS UMR 5128 Laboratoire CP2M Équipe PCM 43 Bd du 11 Nov. 1918 69616 Villeurbanne, CEDEX France
- ChemistLab Michelin CP2M ICBMS joint Laboratory 43 Bd du 11 Nov. 1918 69616 Villeurbanne France
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Disentangled UHMWPE@silica powders for potential use in power bed fusion based additive manufacturing. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Enhancing Chain Mobility of Ultrahigh Molecular Weight Polyethylene by Regulating Residence Time under a Consecutive Elongational Flow for Improved Processability. Polymers (Basel) 2021; 13:polym13132192. [PMID: 34209419 PMCID: PMC8271948 DOI: 10.3390/polym13132192] [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: 05/23/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 11/16/2022] Open
Abstract
Improving the processability of ultrahigh molecular weight polyethylene (UHMWPE) and understanding the effect of the polymeric chain mobility has long been a challenging task. Herein, we show that UHMWPE without any processing aids can be processed at a lower temperature of 180 °C compared to conventional processing temperatures (~250 °C) under a continuous elongational flow (CEF) by using an eccentric rotor extruder (ERE). By probing the effect of the residence time of UHMWPE samples under a CEF on the morphology, rheological behavior and molecular orientation, we find that the long polymer chains of UHMWPE are apt to orientate under a consecutive volume elongational deformation, thereby leading to a higher residual stress for the extruded sample. Meanwhile, the residence time of samples can regulate the polymeric chain mobility, giving rise to the simultaneous decrease of the melting defects and residual stress as well as Hermans orientation function with increasing residence time from 0 to 60 s. This also engenders the enhanced diffusion of UHMWPE segments, resulting in a defect-free morphology and higher entanglement with lower crystallinity but without causing obvious thermal oxidative degradation of UHMWPE. This interesting result could originate from the fast chain entanglement and particle welding enabled by a desirably short residence time, which could be explained by the empirical, entropy-driven melting explosion mechanism.
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