聚(甲基)丙烯酰胺基偶氮苯的合成及其光响应性  

Synthesis of poly[(methyl) acrylamido-azobenzene]and its photoresponsive behavior

作　　者：颜川 黄成进 郭杨鹏 张超 李光华 

机构地区：[1]广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2017年第5期1851-1857,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(21064001);广西自然科学基金资助项目(2014GXNSFAA118042)

摘　　要：为了考察聚甲基丙烯酰胺基偶氮苯(PMAAAB)主链的甲基侧基和溶剂对其光响应性的影响,以对氨基偶氮苯为原料,三乙胺为缚酸剂,分别与丙烯酰氯、甲基丙烯酰氯反应,合成了丙烯酰胺基偶氮苯(AAAB)和甲基丙烯酰胺基偶氮苯(MAAAB),然后以此为单体,偶氮二异丁腈(AIBN)为引发剂,THF为溶剂,通过常规自由基聚合法分别合成了聚丙烯酰胺基偶氮苯(PAAAB)和PMAAAB。利用FT-IR、1H-NMR和GPC对单体和聚合物的结构进行了表征,同时,利用UV考察了主链上甲基侧基、溶剂(CHCl3、THF、DMF)对单体和聚合物的光响应性的影响。结果表明,同一溶剂中,单体的光异构化速率均快于聚合物的;THF、DMF作为溶剂时,PMAAAB的光异构化和回复速率均快于以CHCl3为溶剂的;聚合物主链上甲基侧基的存在使得PMAAAB的光异构化和回复速率均略快于PAAAB的。In order to investigate the effect of methyl side groups attached to main chain and solvents on PMAAAB photoresponsitive behavior, poly （ acrylamido-azobenzene ） （ PAAAB ） and poly （methacrylamido-azobenzene） （PMAAAB） were prepared via radical polymerization, using acrylamido-azobenzene（AAAB） and methacrylamido-azobenzene （MAAB） as monomers, respectively, 2,2-azobisisobutyronitrile （AIBN） as an initiator, and tetrahydrofuran （THF） as solvent. AAAB and MAAAB were synthesized by the reaction of p-aminoazobenzene with acryloyl chloride and methacryloyl chloride, respectively, using triethylamine （TEA） as acid scavenger. The structures of monomers and polymers were characterized by FT-IR, 1H-NMR and GPC. The effects of methyl side groups attached to main chain and solvents （CHC13 ,THF,DMF） on the photoresponsive behavior of monomers and polymers were investigated by UV. The results showed rate of monomerswas faster than that of polymers in the same solvents; that the photo-isomerization the photo-isomerization and recovery rates of PMAAAB were slower in CHC13 than in THF and DMF ; the photo-isomerization and recovery rates of PMAAAB wereslightly faster than that of PAAAB due to the existence of the methyl side groups attached toPMAAAB main chain.

关 键 词：甲基丙烯酰胺基偶氮苯 丙烯酰胺基偶氮苯 自由基聚合 光响应性 

分 类 号：O632.5[理学—高分子化学]