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Polymerization of Methyl Acrylate by a 2,6‐Bis(2‐benzimidazyl)pyridine Zirconium Dichloride/MAO Catalyst System
Author(s) -
Cho Hyun Yong,
Tarte Naresh Hiraral,
Cui Liqiang,
Hong Dae Sik,
Woo Seong Ihl,
Gong YoungDae
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600395
Subject(s) - methylaluminoxane , polymerization , polymer chemistry , catalysis , chain transfer , chemistry , zirconium , bimetallic strip , ligand (biochemistry) , pyridine , metallocene , polymer , organic chemistry , radical polymerization , biochemistry , receptor
Summary: A novel non‐metallocene Zr(IV) complex bearing a bianionic form of the ligand 2,6‐bis(2‐benzimidazolyl)pyridine is synthesized. This Zr complex is an active catalyst for the polymerization of MA via coordination polymerization in the presence of methylaluminoxane MAO. The activity and MWD are increased as the polymerization temperature increases. The maximum activity is observed at Al/Zr molar ratio of 100 and the deactivation is shown above 100, resulting from an inactive bimetallic complex between catalyst and free TMA presented in MAO. Decrease in MWD is observed with higher MAO concentration due to its role in chain transfer during the chain propagation.The reaction of the ligand and catalyst synthesis.