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.
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页码：4329 / 4335
页数：7
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