Sphere to disk transformation of micro-particle composed of azobenzene-containing amphiphilic diblock copolymers under irradiation at 436 nm

被引：26
作者：
Su, Wei
Zhao, Hui
Wang, Zhong
Li, Yinmei
Zhang, Qijin [1 ]
机构：
[1] Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Struct Res Lab, Hefei 230026, Anhui, Peoples R China
[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China
来源：
EUROPEAN POLYMER JOURNAL | 2007年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
azobenzene; diblock copolymer; H-aggregation; photoinduced deformation;
D O I：
10.1016/j.eurpolymj.2006.10.017
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Diblock copolymer composed of azobenzene-containing polyacrylate and poly(acrylic acid) (PAzoM-b-PAA) was prepared using reversible addition-fragmentation chain transfer (RAFT) radical polymerization, which was found to form micro-particles through self-assembly. Under irradiation of light at 436 nm sphere to disk transformation of the micron-particle was observed in situ through an optical microscope. Detailed spectral analysis showed that a disruption of H-aggregate of azobenzene units had taken place during the transformation, from which it is realized that possible driving force of the transformation comes from the photoinduced disruption of H-aggregates within the micro-particles. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：657 / 662
页数：6
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