Photochromic Block Copolymer Poly(styrene-b-azo monomer) by ATRP

被引：4

作者：

Vazquez, Y. ^{[1
]}

Elizalde, L. E. ^{[1
]}

Najera, M. A. ^{[1
]}

de los Santos, G. ^{[1
]}

Telles, J. G. ^{[1
]}

机构：

[1] Ctr Invest Quim Aplicada, Saltillo, Coahuila, Mexico

来源：

MACROMOLECULAR SYMPOSIA | 2009年 / 283-84卷

关键词：

atom transfer radical polymerization (ATRP); block copolymers; polystyrene; POLYMERS;

D O I：

10.1002/masy.200950907

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Photoactive monomers [(E)-1(4-methacryloxyphenyl)-2-(nitrophenyl) diazene] (azo 1) and (E)-1-(4-methacryloxyethyl-phenyl)-2-phenyl-diazene (azo2) were synthesized. The azo 1 monomer showed poor reactivity under the evaluated polymerization method. The Azo 2 monomer was used in the block copolymerization with polystyrene by the normal ATRP methodology. Several polystyrene macroinitiators were prepared with molecular weights Of 10, 20 and 30 k g/mol. The end functionality was increased by the addition of 0.1 equivalents of copper II chloride. Block copolymers in 30% yield and low polydispersity were synthesized by ATRP from the polystyrene macroinitiators and the azo monomer. The block copolymer exhibits good photochromic activity.

引用

页码：45 / 50

页数：6