光响应性聚丙烯酰胺基偶氮苯的合成与表征  

Synthesis and characterization of photoresponsive Poly(acrylamido-azobenzene)

作　　者：李光华[1] 李玉香[1] 赵治巨[1] 何丽秋[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2010年第3期444-450,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：教育部留学回国人员科研启动基金(教外司留[2008]890号);广西大学科研基金(X071018)

摘　　要：通过丙烯酰氯和对氨基偶氮苯的反应合成了丙烯酰胺基偶氮苯（AAAB）;并以此为单体、偶氮二异丁腈（AIBN）为引发剂,四氢呋喃为溶剂,在60℃下,利用常规自由基聚合法制备了聚丙烯酰胺基偶氮苯（PAAAB）。对所制备的AAAB和PAAAB用FT-IR、1H-NMR和GPC进行了表征,并利用UV对单体和聚合物的光响应性进行了研究。结果表明,得到的PAAAB的数均分子量（Mn）约为7360,分子量分布在1.45~1.60。AAAB和PAAAB在紫外光照射下均发生明显的光致异构化,且紫外光照射后的PAAAB溶液在自然光下的回复比暗室快的多。Acrylamido-azobenzene（AAAB）was synthesized by the reaction of acryloyl chloride with p-aminoazobenzene.Then,poly（acrylamido-azobenzene）（PAAAB）was prepared from the monomer AAAB,using conventional radical polymerization with 2,2′-azobisisobutyronitrile（AIBN）as an initiator and THF as a solvent at 60 ℃.The resulting AAAB and PAAAB were characterized by FT-IR,1H-NMR,and GPC,and the photo-responsive behaviors of the monomer and its homopolymer were investigated.These results showed that the number-average molecular weight（Mn） of PAAAB was about 7360 and the molecular weight distribution was in the range of 1.45 to 1.60.Photo-induced isomerization occured for both AAAB and PAAAB,and the recovery of photo-induced PAAAB solution under natural light was faster than in darkroom.

关 键 词：丙烯酰胺基偶氮苯 自由基聚合 偶氮苯聚合物 光响应性 

分 类 号：O632[理学—高分子化学]