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Ethylene/1,3‐Cyclohexadiene Copolymerization by Means of Methylaluminoxane Activated Half‐Sandwich Complexes
Author(s) -
Heiser Dirk E.,
Pelascini Frederic,
Kramer Dominic,
Scott Jennifer,
Gambarotta Sandro,
McCahill Jennifer,
Stephan Douglas W.,
Okuda Jun,
Mülhaupt Rolf
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200690050
Subject(s) - methylaluminoxane , copolymer , ethylene , bimetallic strip , catalysis , polymer chemistry , metallocene , materials science , cobalt , cyclopentadienyl complex , titanium , chemistry , organic chemistry , polymer , polymerization , metallurgy , composite material
Abstract Ethylene copolymerization with 1,3‐cyclohexadiene (CHD) was investigated by using methylaluminoxane (MAO) activated single‐site catalysts including bridged and non‐bridged titanium half‐sandwich and bimetallic cobalt(I) complexes. MAO activated CpTiCl 2 [NP( t Bu) 3 ] (Cp = cyclopentadienyl, t Bu = tert ‐butyl) gave high molecular weight CHD copolymers without encountering catalyst activity losses. According to the NMR microstructure investigation the resulting copolymers are highly regioregular.