Effects of molecular weight on dual light- and thermo-responsive behaviors of homopolymers with azobenzene units and terminal oligo(ethylene glycol) units
Effects of molecular weight on dual light- and thermo-responsive behaviors of homopolymers with azobenzene units and terminal oligo(ethylene glycol) units
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DOI：
10.1002/pi.5434
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发表时间：
2017-12
影响因子：
3.2
通讯作者：
ChangAn Yang;Chen Ling;He Huang;Ying Lu;Biquan Xiong;Yu Liu;Jian-min Yi
中科院分区：
文献类型：
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作者：
ChangAn Yang;Chen Ling;He Huang;Ying Lu;Biquan Xiong;Yu Liu;Jian-min Yi
采用可逆加成-断裂链转移聚合的方法合成了一系列水溶性双光响应和热响应均聚物，其分子量（Mn = 0.69 × 104 ~ 4.60 × 104 g mol - 1）为偶氮苯和末端低聚乙二醇。所有均聚物均表现出可逆的光异构化，其较低的临界溶液温度随分子量的增加而异常升高。有趣的是，通过增加分子量，这些聚合物的聚集体形态从球形演变成圆柱形。©2017化学工业学会
A series of water-soluble dual light- and thermo-responsive homopolymers bearing azobenzene units and terminal oligo(ethylene glycol) units with well-defined molecular weight (Mn = 0.69 × 104 to 4.60 × 104 g mol−1) were synthesized via reversible addition–fragmentation chain transfer polymerization. All the homopolymers exhibited reversible photoisomerization and their lower critical solution temperatures showed an unusual increase with increasing molecular weight. Interestingly, by increasing the molecular weight, the aggregate morphology of these polymers was found to evolve from a spherical to a cylindrical shape. © 2017 Society of Chemical Industry