N,N-二甲氨基甲基丙烯酸乙酯的原子转移自由基聚合

STUDY ON THE ATOM TRANSFER RADICAL POLYMERIZATION OF N,N-(DIMETHYLAMINO)ETHYL METHACRYLATE

以α-溴代异丁酰乙二醇酯(EB iB)为二官能团小分子引发剂,2,2′-联吡啶(bpy)/CuB r为催化体系,甲醇为溶剂,采用原子转移自由基聚合(ATRP)法合成了两端带B r官能团的聚(N,N-二甲氨基甲基丙烯酸乙酯)(PDM A)大分子引发剂。研究了不同聚合温度(T)及不同设计聚合度(D P)下单体DM A的ATRP反应动力学。结果表明,产物PDM A的分子量随单体转化率(Xa)的增加呈线性增长趋势;其多分散指数(PD I)随反应时间延长变化不大;DM A的ATRP反应在低温反应时为可控/“活性”聚合。

The difunctional macroinitiator of Poly[-N, N- （dimethylamino） ethyl methacrylate] （PDMA） was polymerized by atom transfer radical polymerization （ATRP） in methanol by using 2-Bromoisobutyric acid ethyl ester as initiator and CuBr/bpy as catalyst. The kinetic of this ATRP reaction was studied in detail at different polymerization temperatures （T） and various degrees of polymerization （DP）. The results show that the molecular weight （^Mn） characterized by gel permeation chromatography（GPC） increases almost linearly as the increase of the conversion of the monomer DMA. The polydispersity index （PDI） shows little vibration with the increase of polymerization time. The ATRP reaction of DMA shows a controlled/‘iving＇ characteristic under a rather low temperature.