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A comparative kinetic study of ethylene polymerization mediated by iron, cobalt and chromium catalysts bearing the same N,N,N-bis(imino) trihydroquinoline
Huang, CB; Zakharov, VA; Semikolenova, NV; Matsko, MA; Solan, GA; Sun, WH
2019
Source PublicationJOURNAL OF CATALYSIS
ISSN0021-9517
Volume369Pages:1-9
AbstractThe iron(11), cobalt(II) and chromium(III) chlorides, 12-{(2,4,6-Me3C6H2)NCMe)-8-(N(2,4,6-Me3C6H2)) C3H8N]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. (C) 2018 Elsevier Inc. All rights reserved.
Keyword2-(1-(Arylimino)ethyl]-8-arylimino-5,6,7-tri hydroquinoline Cobalt Iron Chromium Kinetic data Ethylene polymerization
MOST Discipline CatalogueChemistry ; Engineering
DOI10.1016/j.jcat.2018.10.028
Indexed BySCI
Language英语
WOS SubjectChemistry ; Physical ; Engineering ; Chemical
WOS IDWOS:000460711700001
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/41956
Collection工程塑料实验室
Affiliation1.Zakharov, VA (reprint author), Boreskov Inst Catalysis, Pr Lavrentieva 5, Novosibirsk 630090, Russia.
2.Zakharov, VA (reprint author), Novosibirsk State Univ, Pirogova 2, Novosibirsk 630090, Russia.
Recommended Citation
GB/T 7714
Huang, CB,Zakharov, VA,Semikolenova, NV,et al. A comparative kinetic study of ethylene polymerization mediated by iron, cobalt and chromium catalysts bearing the same N,N,N-bis(imino) trihydroquinoline[J]. JOURNAL OF CATALYSIS,2019,369:1-9.
APA Huang, CB,Zakharov, VA,Semikolenova, NV,Matsko, MA,Solan, GA,&Sun, WH.(2019).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,369,1-9.
MLA Huang, CB,et al."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 369(2019):1-9.
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