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Kinetic Features of Ethylene Сopolymerization with 1-​Hexene over Titanium-​Magnesium Ziegler-​Natta Catalysts: Effect of Comonomer on the Number of Active Centers and the Propagation Rate Constant Full article

Journal Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694
Output data Year: 2019, Volume: 369, Pages: 276-282 Pages count : 7 DOI: 10.1016/j.jcat.2018.11.008
Tags Ethylene/1-hexene copolymerization; Number of active centers; Polymerization kinetics; Propagation rate constant; Ziegler–Natta catalysts
Authors Sukulova V.V. 1 , Barabanov A.A. 1 , Matsko M.A. 1 , Zakharov V.A. 1,2 , Mikenas T.B. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Pr. Akademika Lavrentieva 5, 630090 Novosibirsk, Russia
2 Novosibisk State University, Pirogova str. 2, 630090 Novosibirsk, Russia

Funding (1)

1 Ministry of Science and Higher Education of the Russian Federation ГЗ-2017-2020

Abstract: We present data on the no. of active centers (CP) and the propagation rate const. (kP) upon copolymn. of ethylene and 1-​hexene over supported titanium-​magnesium catalysts of different compns. obtained by polymn. quenching with radioactive carbon monoxide (14CO)​. The rise in ethylene​/1-​hexene copolymn. rate as compared to the rate of homopolymn. (the comonomer effect) is found to be related to the increase in the calcd. propagation rate const. Meanwhile, the increased 1-​hexene concn. results in a higher calcd. kP value. Addn. of 1-​hexene during ethylene polymn. also increases the polymn. rate by raising the calcd. kP value. These findings demonstrate that the comonomer effect is caused by the increase in monomer concn. in the copolymer layer that is formed on a catalyst particle and is characterized by reduced crystallinity as compared to that of homopolymer. The decline in the copolymn. rate with time is caused by redn. of the no. of active centers.
Cite: Sukulova V.V. , Barabanov A.A. , Matsko M.A. , Zakharov V.A. , Mikenas T.B.
Kinetic Features of Ethylene Сopolymerization with 1-​Hexene over Titanium-​Magnesium Ziegler-​Natta Catalysts: Effect of Comonomer on the Number of Active Centers and the Propagation Rate Constant
Journal of Catalysis. 2019. V.369. P.276-282. DOI: 10.1016/j.jcat.2018.11.008 WOS Scopus РИНЦ РИНЦ РИНЦ AN OpenAlex
Dates:
Submitted: May 10, 2018
Accepted: Nov 5, 2018
Published online: Nov 27, 2018
Published print: Jan 1, 2019
Identifiers:
Web of science: WOS:000460711700029
Scopus: 2-s2.0-85057167420
Elibrary: 38626838 | 41786316 | 41610949
Chemical Abstracts: 2018:2242731
OpenAlex: W2902540221
Citing:
DB Citing
Scopus 11
Web of science 10
Elibrary 11
OpenAlex 10
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