Heterogeneity of Active Sites in the Polymer Chain Transfer Reactions at Olefin Polymerization over Multisite Supported Ziegler-Natta Catalysts Review
| Journal |
Polymers
, E-ISSN: 2073-4360 |
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| Output data | Year: 2023, Volume: 15, Number: 21, Article number : 4316, Pages count : 17 DOI: 10.3390/polym15214316 | ||
| Tags | olefin polymerization; chain transfer reaction; polyethylene; polypropylene; polyolefins; polyhexene-1; active sites; molecular weight; molecular weight distribution titanium–magnesium catalysts; copolymerization | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2021-2023 |
Abstract:
In this review, we summarize and discuss our experimental data published in a number of papers on the transfer reactions of polymer chains in the polymerization of ethylene, propylene, and hexene-1, and the copolymerization of ethylene with α-olefins over multisite supported titanium–magnesium catalysts (TMC). Three groups of transfer reactions are discussed in the review: (1) transfer reactions with AlEt3 cocatalyst, (2) transfer reactions with hydrogen, and (3) transfer reactions with participation of α-olefins in the case of ethylene copolymerization with α-olefins. We have found polymerization conditions where it is possible to observe heterogeneity of active sites of TMC for all three groups of the indicated reactions. It is shown that (1) the transfer reaction with AlEt3 proceeds with higher reactivity on the active sites that produce polymers with low molecular weight; (2) the transfer reaction with hydrogen, in the case of α-olefin polymerization and copolymerization of ethylene with α-olefins, proceeds with higher reactivity on the active sites which produce polymers with high molecular weight; (3) the transfer reaction with α-olefins proceed with higher reactivity on the active sites that produce high molecular weight polymers.
Cite:
Matsko M.
, Zakharov V.
Heterogeneity of Active Sites in the Polymer Chain Transfer Reactions at Olefin Polymerization over Multisite Supported Ziegler-Natta Catalysts
Polymers. 2023. V.15. N21. 4316 :1-17. DOI: 10.3390/polym15214316 WOS Scopus РИНЦ AN OpenAlex
Heterogeneity of Active Sites in the Polymer Chain Transfer Reactions at Olefin Polymerization over Multisite Supported Ziegler-Natta Catalysts
Polymers. 2023. V.15. N21. 4316 :1-17. DOI: 10.3390/polym15214316 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Aug 31, 2023 |
| Accepted: | Nov 1, 2023 |
| Published print: | Nov 3, 2023 |
| Published online: | Nov 3, 2023 |
Identifiers:
| Web of science: | WOS:001099638600001 |
| Scopus: | 2-s2.0-85176499366 |
| Elibrary: | 55926444 |
| Chemical Abstracts: | 2023:2385794 |
| OpenAlex: | W4388288496 |