摘要
设计合成了具有光响应性的A2BA2型两亲嵌段共聚物。聚乙二醇(PEG600)与2,2-二氯乙酰氯通过酯化反应制备结构对称的四官能团大分子引发剂,引发偶氮苯单体6-[4-(4-乙氧基苯基偶氮)酚氧基]己基甲基丙烯酸酯(AZO6Et)的原子转移自由基聚合(ATRP)反应。利用凝胶色谱(GPC)与核磁共振氢谱(1H-NMR)表征了产物的分子量与结构组成,利用差示扫描量热法(DSC)与偏光显微镜(POM)对聚合物的热行为及液晶性进行了表征。在紫外/可见光照射下聚合物溶液呈现明显的光响应性。
Photo-responsive A2BA2-type amphiphilic block copolymer containing azobenzene was designed and synthesized.Macroinitiator prepared by the esterification between poly（ethylene oxide）（PEG） and 2,2-dichloroacetyl chloride was utilized to initiate the atom transfer radical polymerization（ATRP） of 6-[4-（4-ethoxyphenylazo）phenoxy]hexyl methacrylate（AZO6Et）.The resulting macroinitiator and the block copolymer were characterized by 1H-NMR,gel permeation chromatography（GPC）.Differential scanning calorimeter（DSC） and polarizing optical microscopy（POM） were performed to reveal its thermal behaviors and liquid crystalline property.The solution of the block copolymer exhibits photoresponsive under UV/vis irradiation.The block copolymer shows nematic phase,which is promising in some areas,such as optical data storage,optical switch,and molecular devices.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第12期31-33,37,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20134020)
山东省教育厅科技计划项目(J05D11)
关键词
光响应性
A2BA2型
两亲嵌段共聚物
液晶性
原子转移自由基聚合
photo-responsive
A2BA2-type
amphiphilic block copolymer
liquid crystalline property
atom transfer radical polymerization
