超支化偶氮聚酯的合成及光致变色性能  

Synthesis and Photochromic Properties of a Hyperbranched Azo Polyester

作　　者：冯宗财[1,2] 宋秀美[1] 王跃川[2] 黄香兰[1] 杨育访 

机构地区：[1]湛江师范学院化学科学与技术学院,广东高校新材料工程技术开发中心,广东湛江524048 [2]高分子材料工程国家重点实验室(四川大学),四川成都610065

出　　处：《高分子材料科学与工程》2013年第11期6-9,共4页Polymer Materials Science & Engineering

基　　金：广东省自然科学基金项目资助(S2011010001544);高分子材料工程国家重点实验室开放课题基金资助(KF201208);国家星火计划项目资助(2012GA780015)

摘　　要：以2,4,2′-三羟基偶氮苯、丁二酸为原料,首先将丁二酸转化为丁二酰氯,利用酰氯基团与羟基的反应活性,通过A2+B3方法合成超支化偶氮聚酯。采用红外光谱等表征了聚合物的结构,通过UV-Vis光谱研究了偶氮聚合物的光致变色特性。结果表明,超支化偶氮聚酯π-π*跃迁最大吸收峰和单体2,4,2′-三羟基偶氮苯一致,且不受聚合物结构的影响,反-顺异构化反应速率随聚合物结构中偶氮基元的增加而增加,并大于偶氮苯单体的光异构反应速率。热分析表明,合成聚合物在200℃以内具有较好的热稳定性。Starting from 2,4,2′-trihydroxy azobenzene and succinic acid, the hyperbranched azo polyester was synthesized by the reaction of succinyl chloride and hydroxy via A2＋B3 polycondensation. The structure of the hyperbranched azo polyester was characterized by IR, TG, and its photochromic property was tested by UV-Vis spectrum. The results reveal that the hyperbranched azo polyester and 2,4,2′-trihydroxy azobenzene has the same π-π＊ warp maximum absorption peak, which does not be affected by the structure of the polymer. With the increasing of azo unit in polymer, the reaction rate of trans-cis isomerization which is larger than that of the monomer increases. The target polymer has a good thermal stability within 200 ℃.

关 键 词：超支化 偶氮苯 合成 光致变色 

分 类 号：O631.24[理学—高分子化学]