Homopolymerizations and random copolymerizations of olefins with amino-substituted cyclopentadienylchromium complexes

被引:21
|
作者
Ogata, K [1 ]
Nakayama, Y [1 ]
Yasuda, H [1 ]
机构
[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan
关键词
organochromium complexes; polyethylene (PE); polyethylene-co-propylene); polyethylene-co-1-hexene); polypropylene-co-1-hexene); initiator; polyolefins; copolymerization;
D O I
10.1002/pola.10365
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
1-(2 N,N-Dimethylaminoethyl)-2,3,4,5-tetramethylcyclopentadienyl-chromium dichloride (1), (2-N,N-dimethylaminoethyl)cyclopentadienylchromium dichloride (6), and (2-N,N-dimethylaminoethyl)indenylchromium dichloride (7) in the presence of modified methylaluminoxane exhibit high catalytic activities for the polymerization of ethylene with random copolymerizations of ethylene with propylene, ethylene with 1-hexene, and propylene with 1-hexene. These initiators conduct polymerizations to give high molecular weight polymers with low polydispersities. However, the stereo-regularities are very poor in these reactions. (C) 2002 Wiley Periodicals, Inc.
引用
收藏
页码:2759 / 2771
页数:13
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