New neutral Ni(II)- and Pd(II)-based initiators for polymerization of styrene

被引：23
|
作者：
Sun, HM [1 ]
Shen, Q
Yang, MJ
机构：
[1] Suzhou Univ, Dept Chem & Chem Engn, Suzhou 215006, Peoples R China
[2] Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China
来源：
EUROPEAN POLYMER JOURNAL | 2002年 / 38卷 / 10期
基金：
中国国家自然科学基金;
关键词：
styrene; late transition metal acetylide complex; initiator; polymerization; atactic;
D O I：
10.1016/S0014-3057(02)00092-7
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Neutral nickel and palladium sigma-acetylide complexes [Ni(Cequivalent toCPh)(2)(PBu3)(2)] and [Pd(Cequivalent toCPh)(2)(PBu3)(2)] are novel initiators for the polymerization of styrene in CHCl3 over a range of polymerization temperature from 40 to 60 degreesC. Between them, the nickel catalyst exhibited much higher activity than the palladium catalyst. The polystyrene obtained with Ni(II) initiator was a syndio-rich atactic polymer and its weight-average molecular weight reached 279 000. The mechanism of the polymerization was discussed and a radical mechanism was proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：2045 / 2049
页数：5
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