Highly efficient Ethylene/Cyclopentene copolymerization with exclusive 1,2-cyclopentene incorporation by (Cyclopentadienyl)(ketimide)titanium(IV) Complex-MAO catalysts

被引：45

作者：

Liu, Jingyu ^{[1
]}

Nomura, Kotohiro ^{[1
]}

机构：

[1] NAIST, Grad Sch Mat Sci, Nara 6300101, Japan

来源：

ADVANCED SYNTHESIS & CATALYSIS | 2007年 / 349卷 / 14-15期

关键词：

copolymerization; cyclopentadienyl ligands; cyclopentene; ethylene; titanium;

D O I：

10.1002/adsc.200700247

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The (cyclopentadienyl)(ketimide)titanium(TV) complex (t-BuC5H4)TiCl2 [N=C(t-Bu)(2)] exhibited remarkable catalytic activities (1.99-3.16 X 10(4) kg polymer/mol Ti center dot h) with efficient cyclopentene incorporation in ethylene/cyclopentene copolymerization in the presence of methylaluminoxane (MAO). The polymerization took place with exclusive 1,2-cyclopentene incorporation, affording high molecular weight (alternating) copolymers (cyclopentene < 43.6 mol %) with uniform distributions. The effect of the cyclopentadienyl fragment (Cp') in the copolymerization using Cp'TiCl2[N=C(t-BU)2] [Cp'=indenyl, t-BuC5H4, C5Me5 (CP*), C5H5 (Cp)] has been explored in the presence of MAO; the Cp' plays an important key role in terms of both activity and efficient cyclopentene incorporation.

引用

页码：2235 / 2240

页数：6

共 43 条

[1] Crystalline alternating sequences identified in ethylene-co-norbornene polymers produced by the (η5-C2B9H11)Zr(NEt2)2(NHEt2)-AliBu3 catalyst [J].