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Propylene Polymerization Behavior of Fluorinated Bis(phenoxy‐imine) Ti Complexes with an MgCl 2 ‐Based Compound (MgCl 2 ‐Supported Ti‐Based Catalysts)
Author(s) -
Nakayama Yasushi,
Saito Junji,
Bando Hideki,
Fujita Terunori
Publication year - 2005
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.200500290
Subject(s) - catalysis , polymerization , tacticity , polymer chemistry , propylene oxide , imine , coordination polymerization , chemistry , materials science , copolymer , solution polymerization , polymer , organic chemistry , ethylene oxide
Abstract Summary: Fluorinated bis(phenoxy‐imine)Ti complexes 1 – 3 combined with MgCl 2 / i ‐Bu n Al(OR) 3− n (MgCl 2 ‐supported catalysts) were able to polymerize propylene in a living fashion at room temperature to provide slightly to highly syndiotactic poly(propylenes) (PPs) with extremely narrow distributions of molecular weight. These represent the first examples of MAO‐ and borate‐free group 4 metal‐based living catalysts. The supported complexes 2 and 3 formed PPs with higher syndiotacticity and T m 's than the corresponding homogeneous MAO‐activation systems (e.g., 3 : rr 97%, T m 155 °C; MAO activation: rr 93%, T m 152 °C). The measured T m of 155 °C represents the highest known T m for syndiotactic PPs synthesized at room temperature.Polymerization of propylene to poly(propylene) with supported Ti‐based catalysts.