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Bis(Phenoxy‐Imine) Zr Complexes/Et 3 Al/Heteropoly Compound Catalyst Systems for Ethylene Polymerization
Author(s) -
Bando Hideki,
Nakayama Yasushi,
Sonobe Yoshiho,
Fujita Terunori
Publication year - 2003
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200350018
Subject(s) - imine , ethylene , catalysis , polyethylene , polymerization , polymer chemistry , chemistry , medicinal chemistry , stereochemistry , materials science , organic chemistry , polymer
Abstract Bis(phenoxy‐imine) Zr complexes upon activation with Et 3 Al/(Ph 3 C) m H n [PMo 12 O 40 ] · 8 H 2 O (average: m / n = 2:1) were demonstrated to be highly active catalysts for the polymerization of ethylene. One of the complexes formed narrow‐molecular‐weight distributed polyethylene ( $\overline M _{\rm w} /\overline M _{\rm n}$ 1.45) with a very high activity (5640 kg‐PE · mol‐cat −1 · h −1 ), representing the first example of a MAO‐ and borate‐free, highly active, single‐site catalyst system based on a Group 4 transition metal complex and a heteropoly compound.Catalysis of ethylene with bis(phenoxy‐imine) Zr complexes activated with Et 3 Al/(Ph 3 C) m H n [PMo 12 O 40 ] · 8 H 2 O.