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Controlling the ethylene polymerization parameters in iron pre-catalysts of the type 2-[1-(2,4-dibenzhydryl-6-methylphenylimino)ethyl]-6-[1-(arylimino) ethyl] pyridyliron dichloride

Zhao, Weizhen; Yu, Jiangang; Song, Shengju; Yang, Wenhong; Liu, Hao; Hao, Xiang; Redshaw, Carl; Sun, Wen Hua

Authors

Weizhen Zhao

Jiangang Yu

Shengju Song

Wenhong Yang

Hao Liu

Xiang Hao

Carl Redshaw

Wen Hua Sun



Abstract

The ligand series 2-[1-(2,4-dibenzhydryl-6-methylphenylimino)ethyl]-6-[1- (arylimino)ethyl]pyridines and the iron(II) chloride complexes thereof have been synthesized and characterized by elemental and spectroscopic analyses. The molecular structures of C1 and C2, determined by single-crystal X-ray diffraction analysis, confirmed a pseudo-square-pyramidal geometry at the iron center. Upon treatment with either MAO or MMAO, all iron pre-catalysts possessed good thermo-stability and exhibited high activities [up to 5.22 × 10 7 g mol-1(Fe) h-1] toward ethylene polymerization, producing highly linear polyethylene products. Optimization of the reaction parameters gave polyethylenes with narrow molecular weight distributions, indicating that single-site active species were formed; the molecular weights of the resultant polyethylenes could also be controlled.

Citation

Zhao, W., Yu, J., Song, S., Yang, W., Liu, H., Hao, X., Redshaw, C., & Sun, W. H. (2012). Controlling the ethylene polymerization parameters in iron pre-catalysts of the type 2-[1-(2,4-dibenzhydryl-6-methylphenylimino)ethyl]-6-[1-(arylimino) ethyl] pyridyliron dichloride. Polymer, 53(1), 130-137. https://doi.org/10.1016/j.polymer.2011.11.024

Journal Article Type Article
Acceptance Date Nov 15, 2011
Online Publication Date Nov 22, 2011
Publication Date Jan 5, 2012
Deposit Date Jun 8, 2022
Journal Polymer
Print ISSN 0032-3861
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 53
Issue 1
Pages 130-137
DOI https://doi.org/10.1016/j.polymer.2011.11.024
Public URL https://hull-repository.worktribe.com/output/3622298