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Lin TW, Padilla-Vélez O, Kaewdeewong P, LaPointe AM, Coates GW, Eagan JM. Advances in Nonreactive Polymer Compatibilizers for Commodity Polyolefin Blends. Chem Rev 2024. [PMID: 39052522 DOI: 10.1021/acs.chemrev.4c00047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Recycling mixed polyolefin plastics is a significant challenge due to the limitations in sorting and degraded mechanical properties of blends. Nonreactive compatibilization by adding a small amount of polymeric additive is a widespread approach to restoring the performance and value of recycled plastics. Over the past several decades, synthetic advances have enabled access to low-cost copolymers and precision architectures for deepening the understanding of compatibilization mechanisms in semicrystalline polyolefins. This review covers the design parameters of a polymeric compatibilizer, the testing of blends, the synthetic methods of producing economically viable additives, and surveys the literature of blends of compatibilized HDPE, LLDPE, LDPE, and iPP. From this, readers should gain a comprehension of the polymer mechanics, synthesis, and macromolecular engineering of processable polyolefin blends, along with the field's future directions.
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Affiliation(s)
- Ting-Wei Lin
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Omar Padilla-Vélez
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Parin Kaewdeewong
- School of Polymer Science and Polymer Engineering, The Goodyear Polymer Science Building, University of Akron, Akron, Ohio 44325-3909, United States
| | - Anne M LaPointe
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - James M Eagan
- School of Polymer Science and Polymer Engineering, The Goodyear Polymer Science Building, University of Akron, Akron, Ohio 44325-3909, United States
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2
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Wood ZA, Castro EC, Nguyen AN, Fieser ME. Conversion of waste poly(vinyl chloride) to branched polyethylene mediated by silylium ions. Chem Sci 2024; 15:8766-8774. [PMID: 38873082 PMCID: PMC11168076 DOI: 10.1039/d4sc00130c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/18/2024] [Indexed: 06/15/2024] Open
Abstract
Full dechlorination of poly(vinyl chloride) (PVC) in a controlled manner to yield useful polymeric and chlorinated products is of great interest for the processing of PVC waste. Forming polyethylene (PE) without corrosive by-products would allow for a pre-treatment of PE wastes that are often contaminated with PVC. Herein, full dechlorination of PVC has been achieved via generation of silylium ions in situ, to furnish PE products. Complete dechlorination of PVC can be achieved in 2 hours, yielding organic polymer that has similar spectroscopic and thermal signatures of branched PE, with no observable chlorine. The degree of branching can be tuned between 31 and 57 branches per 1000 carbons, with melting temperatures ranging from 51 to 93 °C. This method is applicable to not only pure PVC, but also commercial PVC products. Depending on if the PVC products are separated from plasticizers, different melting points of the resulting PE are observed. PVC dechlorination in the presence of PE waste is also shown. This is the first report of being able to cleanly convert PVC waste to PE in high yields and tune the thermal properties of the PE product, highlighting the remarkable control that silylium ion mediated transformations enables compared to past chemical methods.
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Affiliation(s)
- Zachary A Wood
- Department of Chemistry, University of Southern California Los Angeles CA 91706 USA
| | - Eunice C Castro
- Department of Chemistry, University of Southern California Los Angeles CA 91706 USA
| | - Angelyn N Nguyen
- Department of Chemistry, University of Southern California Los Angeles CA 91706 USA
| | - Megan E Fieser
- Department of Chemistry, University of Southern California Los Angeles CA 91706 USA
- Wrigley Institute for Environment and Sustainability University of Southern California Los Angeles CA 91706 USA
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3
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Medina JT, Tran QH, Hughes RP, Wang X, Brookhart M, Daugulis O. Ethylene Polymerizations Catalyzed by Fluorinated "Sandwich" Diimine-Nickel and Palladium Complexes. J Am Chem Soc 2024; 146:15143-15154. [PMID: 38781282 DOI: 10.1021/jacs.4c01322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Nickel and palladium complexes bearing "sandwich" diimine ligands with perfluorinated aryl caps have been synthesized, characterized, and explored in ethylene polymerization reactions. The X-ray crystallographic analysis of the precatalysts 16 and 6b shows differences from their nonfluorinated analogues 17 and 19, with the perfluorinated aryl caps centered precisely over the nickel and palladium centers, which results in higher buried volumes of the metal centers relative to the nonfluorinated analogues. The sandwich diimine-palladium complexes 5a and 5b containing perfluorinated aryl caps polymerize ethylene in a controlled fashion with activities that are substantially increased compared with their nonfluorinated analogues. Migratory insertion rates in relevant methyl ethylene complexes agree with the activities exhibited in bulk polymerization experiments. DFT studies suggest that facility of ethylene rotation from its preferred orientation perpendicular to the Pd-alkyl bond into a parallel in-plane conformation contributes to the higher polymerization activity for 5b relative to 18a. For these palladium systems, polymer molecular weights can be controlled via hydrogen addition (hydrogenolysis), which is unusual for late-transition-metal-catalyzed olefin polymerizations with no catalyst deactivation occurring. Sandwich diimine-nickel complexes 6a and 6b with perfluorinated aryl caps show ethylene polymerization activities that are about half of those of classical tetraisopropyl-substituted catalyst 2 but again are more active than the analogous nonfluorinated sandwich complexes. Ethylene polymerizations exhibit living behavior, and branched ultrahigh-molecular-weight polyethylenes (UHMWPEs) with very low-molecular-weight distributions (less than 1.1) are obtained. The activated nickel catalysts are stable in the absence of monomer and show good long-term stability at 25 °C.
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Affiliation(s)
- Joseph T Medina
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Quan H Tran
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Russell P Hughes
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Xiqu Wang
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Maurice Brookhart
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Olafs Daugulis
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
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4
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Dashti A, Ahmadi M. Recent Advances in Controlled Production of Long-Chain Branched Polyolefins. Macromol Rapid Commun 2024; 45:e2300746. [PMID: 38488683 DOI: 10.1002/marc.202300746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/08/2024] [Indexed: 03/24/2024]
Abstract
Polyolefins, composed of carbon and hydrogen atoms, dominate global polymer production. This stems from the wide range of physical and mechanical properties that various polyolefins can cover. Their versatile properties are largely tuned by chain microstructure, including molar mass distribution, comonomer content, and long-chain branching (LCB). Specifically, LCB imparts unique characteristics, notably enhances processability crucial for downstream applications. Tailoring LCB structural features has encouraged academic and industrial efforts, chronicle in this review from a chemistry standpoint. While encompassing post-reaction modification based traditional methods like peroxide grafting, ionizing beam irradiation, and coupling reactions, the main focus is given to catalyst-centric strategies and innovative polymerization schemes. The advent of single-site catalysts-metallocenes and late transition metals catalysts-amplifies interest in tailored chemical methods, but the progress in LCB formation flourishes via tandem catalytic systems and bimetallic catalysts under controlled reaction conditions. Specifically, the breakthrough in coordinative chain transfer polymerization unveils a novel avenue for controlled LCB synthesis by sequential chain propagation, transfer, liberation, and enchainment. This short review highlights recent approaches for the production of LCB polyolefins that can provide a roadmap crucial for researchers in academia and industry, steering their efforts toward further advancements in the production of tailored polyolefin.
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Affiliation(s)
- Arezoo Dashti
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, 159163-4311, Iran
| | - Mostafa Ahmadi
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, 159163-4311, Iran
- Department of Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128, Mainz, Germany
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5
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Zhou L, He K, Kang SM, Zhou XY, Zou H, Liu N, Wu ZQ. Photoswitchable Enantioselective and Helix-Sense Controlled Living Polymerization. Angew Chem Int Ed Engl 2023; 62:e202310105. [PMID: 37957131 DOI: 10.1002/anie.202310105] [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: 07/17/2023] [Revised: 10/28/2023] [Accepted: 11/13/2023] [Indexed: 11/15/2023]
Abstract
A pair of enantiomeric photoswitchable PdII catalysts, alkyne-PdII /LR-azo and alkyne-PdII /LS-azo , were prepared via the coordination of alkyne-PdII and azobenzene-modified phosphine ligands LR-azo and LS-azo . Owing to the cis-trans photoisomerization of the azobenzene moiety, alkyne-PdII /LR-azo and alkyne-PdII /LS-azo exhibited different polymerization activities, helix-sense selectivities, and enantioselectivities during the polymerization of isocyanide monomers under irradiation of different wavelength lights. Furthermore, the achiral isocyanide monomer A-1 could be polymerized efficiently using alkyne-PdII /LR-azo under dark condition in a living/controlled manner. Further, it generated single right-handed helical poly-A-1m (LR-azo ), confirmed by the circular dichroism spectra and atomic force microscopy images. However, the polymerization of A-1 almost could not be initiated under 420 nm light in identical conditions of dark condition. Moreover, the photoswitchable catalyst alkyne-PdII /LR-azo exhibited high enantioselectivity for the polymerization of the racemates of L-1 and D-1, respectively. D-1 was polymerized preferentially under dark condition with a D-1/L-1 rate ratio of 70, yielding single right-handed polyisocyanides. Additionally, reversible enantioselectivity was observed under 420 nm light using alkyne-PdII /LR-azo , and the calculated polymerization rate ratio of L-1/D-1 was 57 because of the isomerization of the azobenzene moiety of the catalyst. Furthermore, alkyne-PdII /LS-azo showed opposite enantioselectivity and helix-sense selectivity during the polymerization of the racemates of L-1 and D-1.
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Affiliation(s)
- Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Kai He
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Shu-Ming Kang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xing-Yu Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Hui Zou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, Anhui Province, 230009, China
| | - Na Liu
- The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. China
| | - Zong-Quan Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
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6
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Zhao X, Hou Y, Ye L, Zong K, An Q, Liu B, Yang M. Synthesis of α-Diimine Complex Enabling Rapidly Covalent Attachment to Silica Supports and Application of Homo-/Heterogeneous Catalysts in Ethylene Polymerization. Int J Mol Sci 2023; 24:13645. [PMID: 37686453 PMCID: PMC10487567 DOI: 10.3390/ijms241713645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/20/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
For covalent attachment-supported α-diimine catalysts, on the basis of ensuring the thermal stability and activity of the catalysts, the important problem is that the active group on the catalyst can quickly react with the support, anchoring it firmly on the support, shortening the loading time, reducing the negative impact of the support on the active centers, and further improving the polymer morphology, which makes them suitable for use in industrial polymerization temperatures. Herein, we synthesized a α-diimine nickel(II) catalyst bearing four hydroxyl substituents. The hydroxyl substituents enable the catalyst to be immobilized firmly on silica support by covalent linkage in 5-10 min. Compared with the toluene solvent system, the homogeneous catalysts show high activity and thermal stability in hexane solvent at the same conditions. Compared with homogeneous catalysts, heterogeneous catalysis leads to improvements in catalyst lifetime, polymer morphology control, catalytic activity, and the molecular weight of polyethylene (up to 679 kg/mol). The silica-supported catalysts resulted in higher melting temperatures as well as lower branching densities in polyethylenes. Even at 70 °C, the polyethylene prepared by S-CatA-2 still exhibits dispersed particle morphology, and there is no phenomenon of reactor fouling, which is suitable for industrial polymerization processes.
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Affiliation(s)
- Xiaobei Zhao
- Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Yanhui Hou
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin 300160, China
| | - Linlin Ye
- Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Kening Zong
- Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Qingming An
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin 300160, China
| | - Binyuan Liu
- Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Min Yang
- Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
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7
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Wang C, Wang D, Xu T, Zhang Q, Fu Z. Effect of N-Aryl Para-Benzhydryl Substituent on the Thermal Stability of α-Diimine Nickel Catalyst. Macromol Rapid Commun 2023; 44:e2300221. [PMID: 37293788 DOI: 10.1002/marc.202300221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/18/2023] [Indexed: 06/10/2023]
Abstract
The thermal stability of α-diimine nickel catalysts has always been the focus of research. The introduction of large groups in the backbone or N-aryl ortho-position is a relatively mature solution. However, the question of whether the N-aryl bond rotation is a factor affecting the thermal stability of nickel catalysts is still open. In this work, the effects of N-aryl para-benzhydryl substitutes on catalyst thermal stability are investigated, and the results of ethylene polymerization and the factors affecting thermal stability (steric effect, electronic effect, five-membered coordination ring stability, N-aryl bond rotation, etc.) are systematically analyzed. It is believed that the introduction of large steric hindrance groups at the N-aryl para-position hinders the rotation of the N-aryl bond. This obstacle effect is beneficial to improving catalyst thermal stability, and the obstacle capacity is weakened with the increase of ortho-substituent size.
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Affiliation(s)
- Cheng Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P. R. China
- ZJU-Hangzhou Xinglu High-end Polyolefin Research & Development Center, Hangzhou, 310058, P. R. China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou, 310058, P. R. China
| | - Dan Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P. R. China
| | - Tao Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P. R. China
- ZJU-Hangzhou Xinglu High-end Polyolefin Research & Development Center, Hangzhou, 310058, P. R. China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou, 310058, P. R. China
- Hangzhou Xinglu Technologies Co. Ltd., Hangzhou, 310012, P. R. China
| | - Qisheng Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P. R. China
| | - Zhisheng Fu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Yuhangtang Road 866, Hangzhou, 310058, P. R. China
- ZJU-Hangzhou Xinglu High-end Polyolefin Research & Development Center, Hangzhou, 310058, P. R. China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Hangzhou, 310058, P. R. China
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8
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Turney KM, Kaewdeewong P, Eagan JM. Ethylene polymerization using heterogeneous multinuclear nickel catalysts supported by a crosslinked alpha diimine ligand network. Polym Chem 2023. [DOI: 10.1039/d3py00118k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
A crosslinked alpha diimine ligand supporting a nickel metal center polymerizes ethylene to produce polyethylene with controlled microstructures, high activities, and can be removed from the product.
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Affiliation(s)
- Keaton M. Turney
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325-3909 USA
| | - Parin Kaewdeewong
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325-3909 USA
| | - James M. Eagan
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio, 44325-3909 USA
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9
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Zhang Y, Zhang Y, Hu X, Wang C, Jian Z. Advances on Controlled Chain Walking and Suppression of Chain Transfer in Catalytic Olefin Polymerization. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04272] [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)
- Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yuxing Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Xiaoqiang Hu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Chaoqun Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
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10
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Tran TV, Lee E, Nguyen YH, Nguyen HD, Do LH. Customizing Polymers by Controlling Cation Switching Dynamics in Non-Living Polymerization. J Am Chem Soc 2022; 144:17129-17139. [PMID: 36069706 DOI: 10.1021/jacs.2c07098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Controlling the chain growth process in non-living polymerization reactions is difficult because chain termination typically occurs faster than the time it takes to apply an external trigger. To overcome this limitation, we have developed a strategy to regulate non-living polymerizations by exploiting the chemical equilibria between a metal catalyst and secondary metal cations. We have prepared two nickel phenoxyphosphine-polyethylene glycol variants, one with 2-methoxyphenyl (Ni1) and another with 2,6-dimethoxyphenyl (Ni2) phosphine substituents. Ethylene polymerization studies using these complexes in the presence of alkali salts revealed that chain growth is strongly dependent on electronic effects, whereas chain termination is dependent on both steric and electronic effects. By adjusting the solvent polarity, we can favor polymerizations via non-switching or dynamic switching modes. For example, in a 100:0.2 mixture of toluene/diethyl ether, reactions of Ni1 and both Li+ and Na+ cations in the presence of ethylene yielded bimodal polymers with different relative fractions depending on the Li+/Na+ ratio used. In a 98:2 mixture of toluene/diethyl ether, reactions of Ni2 and Cs+ in the presence of ethylene generated monomodal polyethylene with dispersity <2.0 and increasing molecular weight as the amount of Cs+ added increased. Solution studies by NMR spectroscopy showed that cation exchange between the nickel complexes and alkali cations in 98:2 toluene/diethyl ether is fast on the NMR time scale, which supports our proposed dynamic switching mechanism.
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Affiliation(s)
- Thi V Tran
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Eryn Lee
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Yennie H Nguyen
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Hieu D Nguyen
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Loi H Do
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
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11
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Slurry Homopolymerization of Ethylene Using Thermostable α-Diimine Nickel Catalysts Covalently Linked to Silica Supports via Substituents on Acenaphthequinone-Backbone. Polymers (Basel) 2022; 14:polym14173684. [PMID: 36080759 PMCID: PMC9459716 DOI: 10.3390/polym14173684] [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: 07/10/2022] [Revised: 08/18/2022] [Accepted: 09/01/2022] [Indexed: 11/17/2022] Open
Abstract
Four supported α-diimine nickel(II) catalysts covalently linked to silica via hydroxyl functionality on α-diimine acenaphthequinone-backbone were prepared and used in slurry polymerizations of ethylene to produce branched polyethylenes. The catalytic activities of these still reached 106 g/molNi·h at 70 °C. The life of the supported catalyst is prolonged, as can be seen from the kinetic profile. The molecular weight of the polyethylene obtained by the 955 silica gel supported catalyst was higher than that obtained by the 2408D silica gel supported catalyst. The melting points of polyethylene obtained by the supported catalysts S-C1-a/b are all above 110 °C. Compared with the homogeneous catalyst, the branching numbers of the polyethylenes obtained by the supported catalysts S-C1-a/b is significantly lower. The polyethylenes obtained by supported catalyst S-C1-a/b at 30-50 °C are free-flowing particles, which is obviously better than the rubber-like cluster polymer obtained from homogeneous catalyst.
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12
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Xu M, Liu Y, Pang W, Pan Y, Chen M, Zou C, Tan C. Cocatalyst effects in α-diimine nickel catalyzed ethylene polymerization. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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13
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Guo L, Chen W, Wang W, An W, Gao S, Zhao Y, Luo M, He G, Liu T. Ortho-substituent Effect on Metal Coordination Geometry, Chain Microstructure and Polymer Properties in α-Diimine Nickel-catalyzed Long Chain α-Olefin Polymerization. J Catal 2022. [DOI: 10.1016/j.jcat.2022.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Effect of alkylaluminum structure and aggregation state on the micro-kinetics of ethylene polymerization catalyzed by α-diimine nickel complex. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Lu W, Liao Y, Dai S. Facile Access to Ultra-Highly Branched Polyethylenes Using Hybrid “Sandwich” Ni(II) and Pd(II) Catalysts. J Catal 2022. [DOI: 10.1016/j.jcat.2022.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Zheng H, Li Y, Du W, Cheung CS, Li D, Gao H, Deng H, Gao H. Unprecedented Square-Planar α-Diimine Dibromonickel Complexes and Their Ethylene Polymerizations Modulated by Ni–Phenyl Interactions. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00360] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Handou Zheng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Yinwu Li
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Wenbo Du
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Chi Shing Cheung
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Donghui Li
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Heng Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Huiyun Deng
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School of Materials Science and Engineering, PCFM Lab, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
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17
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Selective branch formation in ethylene polymerization to access precise ethylene-propylene copolymers. Nat Commun 2022; 13:725. [PMID: 35132061 PMCID: PMC8821618 DOI: 10.1038/s41467-022-28282-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 01/12/2022] [Indexed: 11/23/2022] Open
Abstract
Polyolefins with branches produced by ethylene alone via chain walking are highly desired in industry. Selective branch formation from uncontrolled chain walking is a long-standing challenge to generate exclusively branched polyolefins, however. Here we report such desirable microstructures in ethylene polymerization by using sterically constrained α-diimine nickel(II)/palladium(II) catalysts at 30 °C–90 °C that fall into industrial conditions. Branched polyethylenes with exclusive branch pattern of methyl branches (99%) and notably selective branch distribution of 1,4-Me2 unit (86%) can be generated. The ultrahigh degree of branching (>200 Me/1000 C) enables the well-defined product to mimic ethylene-propylene copolymers. More interestingly, branch distribution is predictable and computable by using a simple statistical model of p(1-p)n (p: the probability of branch formation). Mechanistic insights into the branch formation including branch pattern and branch distribution by an in-depth density functional theory (DFT) calculation are elucidated. Selective branch formation from uncontrolled chain walking is a longstanding challenge to generate exclusively branched polyolefins. Here the authors report such desirable microstructures in ethylene polymerization enabled by a nickel catalyst at 30 °C–90 °C that fall into industrial conditions and mimic ethylene-propylene copolymers.
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18
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A general cocatalyst strategy for performance enhancement in nickel catalyzed ethylene (co)polymerization. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.12.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Linear/branched Block Polyethylene Produced by α-Diimine Nickel(II) Catalyst and Bis(phenoxy-imine) Zirconium Binary Catalyst System in the Presence of Diethyl Zinc. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2629-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Abel BA, Snyder RL, Coates GW. Chemically recyclable thermoplastics from reversible-deactivation polymerization of cyclic acetals. Science 2021; 373:783-789. [PMID: 34385394 DOI: 10.1126/science.abh0626] [Citation(s) in RCA: 141] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/10/2021] [Accepted: 07/02/2021] [Indexed: 12/15/2022]
Abstract
Identifying plastics capable of chemical recycling to monomer (CRM) is the foremost challenge in creating a sustainable circular plastic economy. Polyacetals are promising candidates for CRM but lack useful tensile strengths owing to the low molecular weights produced using current uncontrolled cationic ring-opening polymerization (CROP) methods. Here, we present reversible-deactivation CROP of cyclic acetals using a commercial halomethyl ether initiator and an indium(III) bromide catalyst. Using this method, we synthesize poly(1,3-dioxolane) (PDXL), which demonstrates tensile strength comparable to some commodity polyolefins. Depolymerization of PDXL using strong acid catalysts returns monomer in near-quantitative yield and even proceeds from a commodity plastic waste mixture. Our efficient polymerization method affords a tough thermoplastic that can undergo selective depolymerization to monomer.
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Affiliation(s)
- Brooks A Abel
- Department of Chemistry and Chemical Biology and Joint Center for Energy Storage Research, Baker Laboratory, Cornell University, Ithaca, NY 14853, USA
| | - Rachel L Snyder
- Department of Chemistry and Chemical Biology and Joint Center for Energy Storage Research, Baker Laboratory, Cornell University, Ithaca, NY 14853, USA
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology and Joint Center for Energy Storage Research, Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.
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21
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Hu X, Zhang Y, Li B, Jian Z. Horizontally and Vertically Concerted Steric Strategy in
α‐Diimine
Nickel Promoted Ethylene (Co)Polymerization
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100312] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Xiaoqiang Hu
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Renmin Street 5625, Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Renmin Street 5625, Changchun Jilin 130022 China
| | - Baixiang Li
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Renmin Street 5625, Changchun Jilin 130022 China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Renmin Street 5625, Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
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22
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Wang YY, Wang CQ, Hu XQ, Xia Y, Chi Y, Zhang YX, Jian ZB. Benzosuberyl Substituents as a “Sandwich-like” Function in Olefin Polymerization Catalysis. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2562-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Soshnikov IE, Semikolenova NV, Bryliakov KP, Antonov AA, Sun WH, Talsi EP. Nature of Heterobinuclear Ni(I) Complexes Formed upon the Activation of the α-Diimine Complex LNi IIBr 2 with AlMe 3 and MMAO. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Igor E. Soshnikov
- Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | | | | | - Artem A. Antonov
- Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Wen-Hua Sun
- State Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Evgenii P. Talsi
- Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
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24
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Zhang Y, Jian Z. Polar Additive Triggered Branching Switch and Block Polyolefin Topology in Living Ethylene Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00174] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yuxing Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
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25
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Li S, Zhao Y, Dai S. Synthesis of polyethylene thermoplastic elastomer by using robust
α‐diimine
Ni(
II
) catalysts with abundant
t
Bu
substituents. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210017] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shuaikang Li
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Anhui University Hefei Anhui China
| | - Yihua Zhao
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Anhui University Hefei Anhui China
| | - Shengyu Dai
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Anhui University Hefei Anhui China
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26
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Moskalev MV, Razborov DA, Skatova AA, Bazanov AA, Fedushkin IL. Alkali Metal Reduction of 1,2‐Bis[(2,6‐dibenzhydryl‐4‐methylphenyl)imino]acenaphthene (Ar
BIG
‐bian) to Radical‐Anion. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202000909] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mikhail V. Moskalev
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Danila A. Razborov
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Alexandra A. Skatova
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Andrey A. Bazanov
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
| | - Igor L. Fedushkin
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences Tropinina Str. 49 603137 Nizhny Novgorod Russian Federation
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27
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Zanchin G, Leone G. Polyolefin thermoplastic elastomers from polymerization catalysis: Advantages, pitfalls and future challenges. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2020.101342] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Wang B, Liu H, Zhang C, Tang T, Zhang X. Propylene homopolymerization and copolymerization with ethylene by acenaphthene-based α-diimine nickel complexes to access EPR-like elastomers. Polym Chem 2021. [DOI: 10.1039/d1py00923k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of acenaphthene-based α-diimine nickel complexes were synthesized and subsequently used for accessing branched EPR-like elastomers with different compositions and chain structures.
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Affiliation(s)
- Beibei Wang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, Jilin, China
- University of Science and Technology of China, Hefei, 230026, Anhui, PR China
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Heng Liu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Chunyu Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Tao Tang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, Jilin, China
- University of Science and Technology of China, Hefei, 230026, Anhui, PR China
| | - Xuequan Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao, 266042, China
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29
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Ma X, Zhang Y, Jian Z. Tunable branching and living character in ethylene polymerization using “polyethylene glycol sandwich” α-diimine nickel catalysts. Polym Chem 2021. [DOI: 10.1039/d0py01689f] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The key effects of polyethylene glycol units as a unique secondary coordination sphere in α-diimine Ni(ii)-mediated ethylene polymerization are comprehensively disclosed.
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Affiliation(s)
- Xin Ma
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
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30
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31
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Zheng H, Zhong L, Du C, Du W, Cheung CS, Ruan J, Gao H. Combining hydrogen bonding interactions with steric and electronic modifications for thermally robust α-diimine palladium catalysts toward ethylene (co)polymerization. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01617a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Thermally robust α-diimine palladium catalysts are highly active for ethylene (co)polymerization at high temperatures by steric and electronic modifications in combination with hydrogen bonding interactions.
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Affiliation(s)
- Handou Zheng
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Liu Zhong
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Cheng Du
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Wenbo Du
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Chi Shing Cheung
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Jingjing Ruan
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Haiyang Gao
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
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32
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Styrene-containing Phosphine-sulfonate Ligands for Nickel- and Palladium-catalyzed Ethylene Polymerization. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-021-2509-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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33
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Tran TV, Karas LJ, Wu JI, Do LH. Elucidating Secondary Metal Cation Effects on Nickel Olefin Polymerization Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02949] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Thi V. Tran
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204, United States
| | - Lucas J. Karas
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204, United States
| | - Judy I. Wu
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204, United States
| | - Loi H. Do
- Department of Chemistry, University of Houston, 4800 Calhoun Rd., Houston, Texas 77204, United States
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34
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Zhang RF, Hou YH, Wei XL, Zhao DD, Cui MM, Zhai FF, Li XL, Liu BY, Yang M. Thermostable α-Diimine Nickel Complexes with Substituents on Acenaphthequinone-backbone for Ethylene Polymerization. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2430-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Tran QH, Brookhart M, Daugulis O. New Neutral Nickel and Palladium Sandwich Catalysts: Synthesis of Ultra-High Molecular Weight Polyethylene (UHMWPE) via Highly Controlled Polymerization and Mechanistic Studies of Chain Propagation. J Am Chem Soc 2020; 142:7198-7206. [DOI: 10.1021/jacs.0c02045] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Quan H. Tran
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Maurice Brookhart
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Olafs Daugulis
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
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36
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Hu X, Zhang Y, Zhang Y, Jian Z. Unsymmetrical Strategy Makes Significant Differences in α‐Diimine Nickel and Palladium Catalyzed Ethylene (Co)Polymerizations. ChemCatChem 2020. [DOI: 10.1002/cctc.202000141] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaoqiang Hu
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P.R. China
- University of Science and Technology of China Hefei 230026 P.R. China
| | - Yuxing Zhang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P.R. China
- University of Science and Technology of China Hefei 230026 P.R. China
| | - Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P.R. China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P.R. China
- University of Science and Technology of China Hefei 230026 P.R. China
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37
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Wu Q, Wang W, Xu G, Pang W, Li Y, Tan C, Wang F. Bulky iminophosphine‐based nickel and palladium catalysts bearing 2,6‐dibenzhydryl groups for ethylene oligo‐/polymerization. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Qitong Wu
- School of Chemistry and Chemical EngineeringHefei University of Technology Hefei 230009 China
| | - Wenbing Wang
- School of Chemistry and Chemical EngineeringHefei University of Technology Hefei 230009 China
| | - Guoyong Xu
- Institutes of Physical Science and Information TechnologyAnhui University Hefei 230601 , Anhui China
| | - Wenmin Pang
- Department of Polymer Science and EngineeringUniversity of Science and Technology of China Hefei 230026 China
| | - Yougui Li
- School of Chemistry and Chemical EngineeringHefei University of Technology Hefei 230009 China
| | - Chen Tan
- Institutes of Physical Science and Information TechnologyAnhui University Hefei 230601 , Anhui China
| | - Fuzhou Wang
- Institutes of Physical Science and Information TechnologyAnhui University Hefei 230601 , Anhui China
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38
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Wang X, Dong B, Yang Q, Liu H, Zhang C, Zhang X. α-Diimine nickel complexes bearing axially bulky terphenyl and equatorially bulky dibenzobarrelene groups: synthesis, characterization and olefin polymerization studies. Polym Chem 2020. [DOI: 10.1039/d0py01152e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new family of asymmetric α-diimine nickel complexes bearing axially and equatorially bulky groups were synthesized successfully. They exhibited high catalytic activities for ethylene polymerization and afforded ultra-high-molecular-weight elastomeric polyethylenes.
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Affiliation(s)
- Xiaohua Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Bo Dong
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Qi Yang
- School of Applied Chemistry and Engineering
- University of Science and Technology of China
- Hefei 230026
- China
| | - Heng Liu
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Chunyu Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Xuequan Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
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