甲基丙烯酸异丁酯的低温原子转移自由基聚合  

ATOM TRANSFER RADICAL POLYMERIZATION OF ISO- BUTYL METHACRYLATE AT LOW TEMPERATURE

作　　者：周弟[1] 朱秀林[1] 程振平[1] 朱健[1] 路建美[1] 

机构地区：[1]苏州大学化学化工学院,江苏苏州215006

出　　处：《高分子材料科学与工程》2005年第1期137-140,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金(20176033);江苏省自然科学基金(BK2001141)资助项目

摘　　要：以α-溴代丁酸乙酯(α-EBrB)/硫氰酸亚铜(CuSCN)/N,N′,N′,N″,N″-五甲基二乙烯基三胺(PMDETA)为引发体系,N,N-二甲基甲酰胺(DMF)为溶剂,研究了甲基丙烯酸异丁酯(i-BMA)的低温(30℃)原子转移自由基聚合(ATRP)。考察了催化体系、配比、引发剂用量以及温度对聚合速率、聚合物的分子量及分子量分布的影响。This paper describes the application of atom transfer radical polymerization of iso-butyl methacrylate at low temperature(30 ℃)by using α-ethyl bromobutyrate(α-EBrB)/CuSCN/N,N,N′,N′,N″-pentamethyldiethylenetriamine(PMDETA) as the initiating system and N, N-dimethylformamide(DMF) as solvent. The effects of catalyst system, ratio of [i-BMA]_0/[α-EBrB]_0/[CuSCN]_0/[PMDETA]_0 and temperature on conversion, molecular weight and polydispersity index were also studied. The results exhibit that the polymerizations of i-BMA conform to first order kinetic behavior, and the molecular weight linearly increases with the monomer conversion, furthermore the polydispersity indexes (PDI) remain in low values ((1.16)～(1.57)). Increasing the amount of initiator can improve the controllability of the polymerization. The polymerization rate increases as increasing the reaction temperature. Obtained polymers have been successful conducted chain extension by using polymer as a macro-initiator; resulted polymers were characterized by NMR, GPC.

关 键 词：原子转移自由基聚合 甲基丙烯酸异丁酯 催化体系 低温 

分 类 号：TQ316.322[化学工程—高聚物工业]