A Comparative Kinetic Study of Ethylene Polymerization Mediated by Iron, Cobalt and Chromium Catalysts Bearing the Same N,N,N-bis(imino)trihydroquinoline | Sciact - CRIS-system of Boreskov Institute of Catalysis

A Comparative Kinetic Study of Ethylene Polymerization Mediated by Iron, Cobalt and Chromium Catalysts Bearing the Same N,N,N-bis(imino)trihydroquinoline Full article

Journal

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Output data

Year: 2019, Volume: 369, Pages: 1-9 Pages count : 9 DOI: 10.1016/j.jcat.2018.10.028

Tags

2-[1-(Arylimino)ethyl]-8-arylimino-5,6,7-trihydroquinoline; Cobalt; Iron; Chromium; Kinetic data; Ethylene polymerization

Authors

Huang Chuanbing ^1,2,3,4 , Zakharov Vladimir A. ^3,4 , Semikolenova Nina V. ³ , Matsko Mikhail A. ³ , Solan Gregory A. ^1,5 , Sun Wen-Hua ^1,2

Affiliations

1	Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2	CAS Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3	Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russian Federation
4	Novosibirsk State University, Pirogova, 2, Novosibirsk 630090, Russian Federation
5	Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, UK

Funding (6)

1	Russian Foundation for Basic Research National Natural Science Foundation of China	18-53-80031 / 51861145303
2	National Natural Science Foundation of China	21871275
3	National Natural Science Foundation of China	5171102116
4	Universities and Colleges Admissions Service	[2015]37
5	Chinese Academy of Sciences
6	Ministry of Science and Higher Education of the Russian Federation	ГЗ-2017-2020

The iron(II), cobalt(II) and chromium(III) chlorides, [2-{(2,4,6-Me3C6H2)NCMe}-8-{N(2,4,6-Me3C6H2)}C9H8N]MCln (n = 2, M = Fe LFeCl2, Co LCoCl2; n = 3, M = Cr LCrCl3), each bearing the same N,N,N-bis(imino)trihydroquinoline chelating ligand, have been employed as precatalysts for ethylene polymerization with modified methylaluminoxane (MMAO) as the co-catalyst. The kinetic profiles for these homogeneous polymerizations are reported in addition to the properties of the resultant polymers under comparable reaction conditions. All the experimental data indicate that the active metal center plays a key role on the catalytic performances of the complexes, especially the polymerization activity, thermal stability and lifetime of the active species. Under optimized conditions the iron catalyst displays the highest rate of polymerization but displays this for only a short period, while the chromium catalyst shows a lower maximum polymerization rate but sustains its performance over a longer period and at a higher temperature. In terms of the polymer properties, all three metal catalysts afford highly linear polymers with the metal center influencing the molecular weight and type of end group. Specifically, the cobalt and chromium catalysts produce narrowly dispersed low molecular weight polymers incorporating vinyl end groups, while the iron catalyst affords polymers of higher molecular weight displaying broad molecular weight distributions, with both fully saturated and unsaturated chain ends.

Huang C. , Zakharov V.A. , Semikolenova N.V. , Matsko M.A. , Solan G.A. , Sun W-H.
A Comparative Kinetic Study of Ethylene Polymerization Mediated by Iron, Cobalt and Chromium Catalysts Bearing the Same N,N,N-bis(imino)trihydroquinoline

Journal of Catalysis. 2019. V.369. P.1-9. DOI: 10.1016/j.jcat.2018.10.028 WOS Scopus РИНЦ РИНЦ РИНЦ AN OpenAlex

Full text from publisher

Submitted:	Sep 13, 2018
Accepted:	Oct 22, 2018
Published online:	Nov 5, 2018
Published print:	Jan 1, 2019

Web of science:	WOS:000460711700001
Scopus:	2-s2.0-85055980167
Elibrary:	38657862 \| 41789308 \| 41620913
Chemical Abstracts:	2018:2099035
OpenAlex:	W2899722704

DB	Citing
Scopus	11
Web of science	10
Elibrary	3 11
OpenAlex	12