THE ROLES OF OXIDATION-STATE, LEWIS-ACID COCATALYST AND SOLVENT POLARITY IN ACTIVATING TITANIUM COMPOUNDS FOR OLEFIN POLYMERIZATION

被引：18

作者：

EISCH, JJ

POMBRIK, SI

SHI, X

WU, SC

机构：

[1] Department of Chemistry, State University of New York at Binghamton, Binghamton, New York

来源：

MACROMOLECULAR SYMPOSIA | 1995年 / 89卷

关键词：

D O I：

10.1002/masy.19950890122

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The polymerization activity of the following three catalyst systems towards ethylene has been investigated and compared: 1) methyltitanocene chloride-Me(2)AlCl; 2) eta(3)-allyltitanocene-Me(2)AlCl and 3) titanium dichloride tetrahydrofuranate-Me(2)AlCl. The first two catalysts formed homogeneous phases and produced linear polymer; the last catalyst functioned in a heterogeneous medium and formed crosslinked polymer. The titanium(IV) catalyst was about 30 times more active than the titanium(III) system and the titanium(II) catalyst on MgCl2 could be made 8 times more active than the titanium(IV) system. A novel mechanism is proposed to explain the behavior and activity of the titanium(II) system.

引用

页码：221 / 229

页数：9

共 14 条

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[2]

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[3]

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