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Influence of mixed aluminoxane systems on ethylenenorbornene copolymerization catalyzed by metallocene
Author(s) -
Wang Qi,
Weng Jianhua,
Fan Zhiqiang,
Feng Linxian
Publication year - 1997
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.1997.030181214
Subject(s) - methylaluminoxane , metallocene , copolymer , norbornene , polymer chemistry , materials science , ethylene , catalysis , post metallocene catalyst , polymerization , chemistry , organic chemistry , polymer , composite material
The norbornene/ethylene copolymerization was investigated using Me 2 SiCp 2 MCl 2 (M = Zr, Ti)/EBAO and MAO as catalyst systems (EBAO: mixed ethyl‐isobutylaluminoxane, MAO: methylaluminoxane). The copolymers were characterized by DSC and 13 C NMR. Copolymers with high content of norbornene and high T g were obtained with the mixed EBAO. It is suggested that the copolymerization is greatly influenced by the state of the ion pair of the metallocene catalyst. The effect of aluminoxane on the composition and the microstructure of copolymer is discussed.