A COMPARISON OF CP2HFCL2 VERSUS CP2ZRCL2 METHYLALUMOXANE CATALYSTS

被引：43

作者：

MALLIN, DT ^{[1
]}

RAUSCH, MD ^{[1
]}

CHIEN, JCW ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003

来源：

POLYMER BULLETIN | 1988年 / 20卷 / 05期

关键词：

Ethylene--Polymerization - Olefins--Polymerization - Polymerization--Catalysts - Transition Metals--Concentration;

D O I：

10.1007/BF01153432

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ethylene polymerizations by Cp2ZrCl2/MAO (MAO = methylalumoxane) and Cp2HfCl2/MAO catalysts are compared. The Hf catalysts have about two-thirds the activity of the Zr catalysts. This difference may be attributed to the greater number of active centers present in the Zr catalyst. The Hf catalyst shows a smaller dependence of: (1) polymer MW on temperature and (2) polymerization activity on transition metal concentration than the Zr catalyst.

引用

页码：421 / 425

页数：5

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