Diolefin polymerization by half-sandwich complexes and MAO as cocatalyst

被引：18
|
作者：
Kaminsky, W
Hinrichs, B
Rehder, D
机构：
[1] Univ Hamburg, Inst Tech & Macromol Chem, D-20146 Hamburg, Germany
[2] Univ Hamburg, Inst Inorgan & Appl Chem, D-20146 Hamburg, Germany
来源：
POLYMER | 2002年 / 43卷 / 25期
关键词：
polydienes; polybutadiene; metallocene catalysts;
D O I：
10.1016/S0032-3861(02)00469-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Different half-sandwich titanium trifluorides and constrained geometry catalysts of titanium and vanadium were used to polymerize butadiene, isoprene, and 1,3-pentadiene. The polybutadienes produced with these catalysts have nearly identical microstructures of about 80% 1,4-cis, 1% 1,4-trans and 19% 1,2-linked units. An optimum activity is obtained by an aluminium/titanium ratio of about 700. There is no dependence of the aluminium/titanium ratio on the microstructure. Vanadium-based complexes are more active for 1,3-pentadiene than titanium complexes. (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码：7225 / 7229
页数：5
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