Hydrogen Effect on the Molecular Weight Distribution of Polymers Obtained by Polymerization of Ethylene and α‐Olefins over Supported Titanium‐Magnesium Catalysts Full article
| Journal |
Journal of Applied Polymer Science
ISSN: 0021-8995 , E-ISSN: 1097-4628 |
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| Output data | Year: 2021, Volume: 138, Number: 16, Article number : 50256, Pages count : 11 DOI: 10.1002/app.50256 | ||||
| Tags | catalysts; kinetics; polyolefins | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
Abstract:
Comparative data on the molecular weight distribution of polymers obtained by polymerization of ethylene, propylene and 1‐hexene, and copolymerization of ethylene with α‐olefins over the titanium‐magnesium catalysts (TMC) in the absence and presence of hydrogen are presented. In contrast to the ethylene polymerization, in the cases of propylene and 1‐hexene polymerization and copolymerization of ethylene with α‐olefins, the hydrogen addition is characterized by noticeable narrowing of the molecular weight distribution (MWD) due to lower contribution of the MWD component with high molecular weight. This result is an evidence of the increased reactivity of TMC active sites producing high molecular weight poly‐α‐olefins and copolymers of ethylene with α‐olefins in the chain transfer reaction with hydrogen. It is suggested that the increased reactivity of these sites in the transfer reaction with hydrogen appears after the 2,1‐addition of α‐olefin to the growing polymer chain.
Cite:
Matsko M.A.
, Nikolaeva M.I.
, Zakharov V.A.
Hydrogen Effect on the Molecular Weight Distribution of Polymers Obtained by Polymerization of Ethylene and α‐Olefins over Supported Titanium‐Magnesium Catalysts
Journal of Applied Polymer Science. 2021. V.138. N16. 50256 :1-11. DOI: 10.1002/app.50256 WOS Scopus РИНЦ AN OpenAlex
Hydrogen Effect on the Molecular Weight Distribution of Polymers Obtained by Polymerization of Ethylene and α‐Olefins over Supported Titanium‐Magnesium Catalysts
Journal of Applied Polymer Science. 2021. V.138. N16. 50256 :1-11. DOI: 10.1002/app.50256 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jul 10, 2020 |
| Accepted: | Oct 26, 2020 |
| Published online: | Nov 15, 2020 |
| Published print: | Apr 20, 2021 |
Identifiers:
| Web of science: | WOS:000589598000001 |
| Scopus: | 2-s2.0-85096662652 |
| Elibrary: | 45123640 |
| Chemical Abstracts: | 2020:2347032 |
| OpenAlex: | W3101324973 |