由NBS引发的MMA的室温电子活化再生原子转移自由基聚合(AGET ATRP)

以N-溴代丁二酰亚胺(NBS)为引发剂、CuBr2/五甲基二亚乙基三胺(PMDETA)络合体系为催化剂、辛酸亚锡(Sn(EH)2)为还原剂、苯甲醚为溶剂,在室温(25℃)条件下实现了对甲基丙烯酸甲酯(MMA)的电子活化再生原子转移自由基聚合(AGET ATRP)。研究了反应温度、溶剂、单体及引发剂用量等因素对反应的影响。聚合过程中数均分子量随单体转化率提高而线性增长,得到的聚合物分子量分布指数(PDI)在1.15~1.31之间。进行了扩链以进一步验证聚合具有活性特征。

AGET ATRP of Methyl Methacrylate Initiated by N-Bromosuccinimide at Room Temperature

N - bromosuccinimide was used as the initiator for the atom transfer radical polymerization using activators generated by electron transfer （AGET ATRP） of methyl methacrylate at ambient temperature （25℃ ） with CuBr2/PMDETA as the catalyst complex, tin（II） 2 -ethylhexanoate [ Sn（EH） 2 ] as the reducing agent, and anisole as the solvent. The effects of factors such as the reaction temperature, solvent, mole ratio of the monomer and initiator, and so on, on the AGET ATRP system are discussed in the present paper. The polymerization showed the linear increase in the average - number molecular weights with monomer conversion and the narrow molecular weight distributions for the obtained polymers （ 1.15 - 1.31 ）. The ＂living＂ feature of the obtained polymer was further confirmed via a chain -extension experiment.