水介质中ATRP法制备PDMAEMA及其温敏性  

Synthesis of Homopolymer PDMAEMA via ATRP in Aqueous Medium and Its Thermosensitivity

作　　者：王淼[1] 张茜[1] 褚立强[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《功能高分子学报》2015年第1期62-66,共5页Journal of Functional Polymers

基　　金：教育部新世纪优秀人才支持计划(NCET-12-1064)

摘　　要：在30℃下以溴化亚铜-溴化铜混合物为催化剂,五甲基二乙烯三胺(PMDETA)为配体,在水介质中利用原子转移自由基聚合法(ATRP)合成聚合度达到300的聚甲基丙烯酸N,N-二甲基氨基乙酯(PDMAEMA)。核磁共振结果显示,聚合反应符合一级反应动力学描述。利用紫外可见分光光度计(UV-Vis)表征该聚合物的温敏性,结果表明,随着PDMAEMA聚合物链长的增加,其最低临界溶解温度(LCST)可降低至31.4℃。A series of poly（2-dimethylaminoethyl methacrylate）（PDMAEMA）with a degree of polymerization up to 300 was successfully synthesized by atom transfer radical polymerization（ATRP）in aqueous medium at 30 ℃ using CuBr-CuBr2 as catalyst and pentamethyl-diethylenetriamine（PMDETA）as ligand.Results of 1H-NMR showed that the polymerization process was in accordance with the first-order kinetic characteristics.The thermosensitivity of the resulting PDMAEMA was determined by turbidity measurements using UV-Vis spectroscopy.Results showed that,when the chain length of PDMAEMA increased,the lower critical solution temperature（LCST）could decrease to 31.4 ℃.

关 键 词：聚甲基丙烯酸N N-二甲基氨基乙酯(PDMAEMA) 原子转移自由基聚合(ATRP) 温敏性 

分 类 号：O06[理学]