Chain transfer reaction in metallocene catalyzed ethylene copolymerization with allyltrimethylsilane

被引：21

作者：

Byun, DJ

Shin, SM

Han, CJ

Kim, SY

机构：

[1] Korea Res Inst Chem Technol, Mat Testing Lab, Taejon 305600, South Korea

[2] Korea Adv Inst Sci & Technol, Ctr Adv Funct Polymers, Dept Chem, Taejon 305701, South Korea

来源：

POLYMER BULLETIN | 1999年 / 43卷 / 4-5期

关键词：

D O I：

10.1007/s002890050619

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In order to investigate the polymerization behavior of allytrimethylsilane as a comonomer, ethylene was copolymerized with allyltrimethylsilane at 80 degrees C in toluene using methylaluminoxane (MAO) activated metallocene catalysts. The catalytic activity of the polymerization strongly depended on both the type of the catalysts and the concentration of allyltrimethylsilane. End group analysis of the copolymers by means of H-1 and C-13 NMR spectroscopy revealed that allyltrimethylsilane rather act as a chain transfer agent in the copolymerization, even though considerable amount of allyltrimethylsilane was incorporated in the polymer chain with rac-Et(Ind)(2)ZrCl2 catalysts. The chain transfer reaction influence strongly the molecular weight and comonomer content of the copolymers.

引用

页码：333 / 340

页数：8

共 20 条

[1] Copolymerization of ethylene and linear 1-olefins with a metallocene catalyst system under high pressure .2. Comparison of propene, 1-butene, 1-hexene and 1-decene [J].