CHAIN TRANSFER IN THE RING-OPENING METATHESIS POLYMERIZATION OF CYCLOOCTADIENE USING DISCRETE METAL ALKYLIDENES

被引：62

作者：

HILLMYER, MA ^{[1
]}

GRUBBS, RH ^{[1
]}

机构：

[1] CALTECH,DIV CHEM & CHEM ENGN,ARNOLD & MABEL BECKMAN LABS CHEM SYNTHESIS,PASADENA,CA 91125

来源：

MACROMOLECULES | 1995年 / 28卷 / 25期

关键词：

D O I：

10.1021/ma00129a027

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 ring-opening metathesis polymerization of cyclooctadiene (COD) in the presence of a difunctional chain transfer agent (CTA) was investigated. The effect of the CTA structure and choice of metathesis catalyst on the overall efficiency of the polymerization reaction is discussed. A separation of the oxygen functionality from the olefin in the CTA by two methylene units significantly enhances the stability of the discrete, tungsten-based metathesis catalyst used for these polymerizations. Furthermore, a more robust well-defined metathesis catalyst based on molybdenum was more effective than the tungsten-based catalyst. The preparation of low-molecular-weight hydroxytelechelic polybutadienes with one type of regiochemistry, number-average functionalities that-approach 2.0, and in high yield was accomplished.

引用

页码：8662 / 8667

页数：6

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