On the polymerization of methyl methacrylate by group 4 metallocenes

被引：101

作者：

Cameron, PA ^{[1
]}

Gibson, VC ^{[1
]}

Graham, AJ ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

来源：

MACROMOLECULES | 2000年 / 33卷 / 12期

关键词：

D O I：

10.1021/ma000130s

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Dimethylzirconocene precatalysts are shown to initiate the polymerization of methyl methacrylate (MMA) when activated by a Lewis acidic methyl abstractor in the absence of any ZnEt2 additive. The order of addition of the various components is crucial to forming a well-defined active species. Conversion of the precatalysts Cp2ZrMe2 (1a), rac- [C2H4(eta(5)-C9H6)(2)]ZrMe2 (2a), {Me2C(eta(5)-C5H4)(eta(5)-C13H8)}-ZrME2 (3a), {Me2C(eta(5)-C5H4)(eta(5)-C9H4)(eta(5)-C9H6)}ZrMe2 (4a), {Me2C(eta(5)-C5H4)(eta(5)-2-MeC9H5)}ZrMe2 (5a), and (Cp)-(Cp*)ZrMc(2) (6a) to their cationic methylzirconocene derivatives (2b-6b) followed by addition of methyl methacrylate results in controlled polymerization to poly(methyl methacrylate) with the exception of 3b which is inactive.

引用

页码：4329 / 4335

页数：7

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