Towards more controlled poly(n-butyl methacrylate) by atom transfer radical polymerization

被引：25

作者：

Ibrahim, K ^{[1
]}

Löfgren, B ^{[1
]}

Seppälä, J ^{[1
]}

机构：

[1] Helsinki Univ Technol, Lab Polymer Technol, Dept Chem Technol, FIN-02015 Helsinki, Finland

来源：

EUROPEAN POLYMER JOURNAL | 2003年 / 39卷 / 05期

基金：

芬兰科学院;

关键词：

ATRP; controlled free radical polymerisation; n-butyl methacrylate; polydispersity; active species; deactivator;

D O I：

10.1016/S0014-3057(02)00309-9

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 homogeneous controlled/'living' free radical polymerization of n-butyl methacrylate in toluene or o-xylene at 90 degreesC, in bulk and in solution, using the novel combination of the catalyst bis-triphenylphosphine iron(II)chloride tetrahydrate (FeCl2.4H(2)O(PPh3)(2)) with ethyl 2-bromoisobutyrate ((CH3)(2)CBrCO2Et)) and alpha,alpha-dichloroacetophenone (CHCl2COPh) as initiators has been investigated. The rate of polymerization initiated by the two initiators exhibited first-order kinetic with respect to the monomer. A linear increase of the number-average molecular weight (M-n) versus monomer conversion was observed for these systems. Among the two initiation systems, ethyl 2-bromoisobutyrate gave the fastest polymerization rate. A system with Fe3+ added at the beginning of the polymerization was examined and the lowest polydispersity (M-w/M-n similar to 1.2) was found when 10% Fe3+, relative to Fe2+ was added. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：939 / 944

页数：6

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