温敏性环状聚合物的制备及表征  

Preparation and Characterization of Temperature-Sensitive Cyclic Polymers

作　　者：南婷婷 高正国 林润雄[1] Nan Tingting;Gao Zhengguo;Lin Runxiong(High Performance Polymer Research Institute,Qingdao University of Science and Technology,Qingdao,Shandong,266042;College of Chemistry&Chemical Engineering,Yantai University,Yantai,Shandong,264005)

机构地区：[1]青岛科技大学高性能聚合物研究院,山东青岛266042 [2]烟台大学化学化工学院,山东烟台264005

出　　处：《现代塑料加工应用》2022年第2期20-23,共4页Modern Plastics Processing and Applications

摘　　要：以溴化亚铜(CuBr)/三(2-二甲氨基乙基)胺(Me_(6)TREN)为催化体系,2-氯丙酸炔丙酯(PCP)为引发剂,应用原子转移自由基聚合(ATRP)方法,引发保护炔基基团的甲基丙烯酸丙炔基酯与N-异丙基丙烯酰胺(NIPAM)共聚,得到末端带有炔基基团的线型聚合物,将线型聚合物叠氮化,使其两端分别带有炔基基团和叠氮基团,通过点击反应得到环状聚合物。当外界温度低于低临界溶解温度(LCST)时,环状聚合物溶液是澄清的;当外界温度高于LCST时,环状聚合物溶液是浑浊的,因此表现出良好的温敏性。Using cuprous bromide(CuBr)/tris(2-dimethylaminoethyl)amine(Me_(6)TREN)as the catalytic system and propargyl-2-chloropropionate(PCP)as the initiator,the atom transfer radical polymerization method(ATRP)was applied to initiate the copolymerization of propargyl methacrylate protecting the alkyne group with N-isopropyl acrylamide(NIPAM)to obtain a linear polymer with alkyne group at the end.The linear polymer was azided so that it had alkyne group and azide group at both ends respectively.Finally,the cyclic polymer was obtained by click chemistry.The results show that the solution of cyclic polymer is clarified when the external temperature is lower than lower critical solution temperature(LCST),and the solution of cyclic polymer is turbid when it is higher than LCST.Therefore,this cyclic polymer exhibits excellent temperature sensitivity.

关 键 词：低临界溶解温度 线型聚合物 环状聚合物 温敏性 

分 类 号：TQ317[化学工程—高聚物工业]