POLYMERIZATION OF PROPYLENE BY ZIRCONOCENIUM CATALYSTS WITH DIFFERENT COUNTERIONS

被引：91

作者：

CHIEN, JCW ^{[1
]}

SONG, W ^{[1
]}

RAUSCH, MD ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS,DEPT CHEM,MAT RES LABS,AMHERST,MA 01003

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 1994年 / 32卷 / 12期

关键词：

ZIRCONOCENE; ZIEGLER-NATTA CATALYSTS; STEREOSPECIFIC OLEFIN POLYMERIZATION;

D O I：

10.1002/pola.1994.080321219

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Propylene was polymerized by binary zirconocenium catalysts derived from rac-ethylene-bis(1-eta5-indenyl)dimethylzirconium and cation forming agents (C6H5)3C+ (C6F5)4B- and (C6F5)3B. Polymerizations were also performed with the ternary systems of Et [Ind]2ZrCl2, Et3Al, and the cation forming agents. The catalyst systems, with the inert noncoordinating counter-ion, (C6F5)4B-, have much higher activity and stereoselectivity than the ones with the CH3B- (C6F5)3 counter-ion. Much less active still are catalysts having BF4- or (C6H5)4B- counter-ions. Similar but smaller effects of counter-ion structure on ethylene polymerization were observed. (C) 1994 John Wiley & Sons, Inc.

引用

页码：2387 / 2393

页数：7

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