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发明授权
CN108164655B 一种侧链含偶氮吡啶的N-异丙基丙烯酰胺共聚物的应用 有权

一种侧链含偶氮吡啶的N-异丙基丙烯酰胺共聚物的应用
摘要：
本发明公开了一种侧链含偶氮的N‑异丙基丙烯酰胺共聚物的应用。甲基丙烯酸‑4‑(4‑吡啶基偶氮)苯酯(PAZO)、N‑异丙基丙烯酰胺(NIPAM)和聚乙二醇甲醚甲基丙烯酸酯(EGMA)无规共聚得到多重响应三元共聚物P(NIPAM‑co‑PAZO‑co‑EGMA)。采用凝胶渗透色谱和核磁共振氢谱对聚合物的结构进行表征，经紫外光谱对聚合物进行研究，发现聚合物具有良好的光致顺反异构。聚合物最低相转变温度(LCST)为49℃，经紫外光照LCST下降2℃变为47℃，同时聚合物对pH值也具有响应性，聚合物溶液通入CO2后LCST变为62℃，升高了13℃。向溶液中通入氩气排除CO2，溶液的LCST再次变为49℃。交替通入CO2和氩气，溶液LCST具有可逆性。表明该聚合物具有温度、光、pH以及气体响应性。
摘要（英）：

The invention discloses application of an N-isopropyl acrylamide copolymer containing azopyridine in a side chain. A multiple response terpolymer P(NIPAM-co-PAZO-co-EGMA) is prepared by carrying out random copolymerization on methacrylic acid-4-(4-pyridyl azo) phenyl ester PAZO, N-isopropyl acrylamide (NIPAM) and methoxypolyethylene glycol methacrylate (EGMA). The structure of the polymer is characterized by adopting gel permeation chromatography and nuclear magnetic resonance, and is studied by using an ultraviolet spectrum, and that the polymer has good photoinduced cis-trans isomerization is found. The low critical solution temperature (LCST) of the polymer is 49 DEG C, is reduced by 2 DEG C after ultraviolet illumination and finally is changed into 47 DEG C; meanwhile, the polymer is also responsive to a pH value; the LCST is changed into 62 DEG C which raises by 13 DEG C after CO2 is introduced into a polymer solution; argon is introduced into the solution so as to remove the CO2and enable the LCST of the solution to be changed into 49 DEG C again. The LCST of the solution has reversibility by alternately introducing the CO2 and the argon. Therefore, the polymer has responsibility to temperature, light, pH and gas.

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