丙烯酰胺在离子液体中的原子转移自由基聚合

在1-丁基-3-甲基咪唑四氟硼酸盐离子液体中以氯化苄为引发剂，氯化亚铜/2,2’-联吡啶为催化剂成功实现了丙烯酰胺的原子转移自由基聚合(ATRP)。用IR对聚合物的结构进行了表征，证实聚合物链端具有-Cl端基。考察了引发剂用量、催化剂和配体用量、单体用量和反应时间等因素对丙烯酰胺在离子液体中的原子转移自由基聚合的影响，结果表明，反应时间为1.5 h时转化率达到31.43%，M_n^GPC=4451，M_w/M_n=1.38。且80 ℃下丙烯酰胺在离子液体中的最佳聚合工艺条件为：单体浓度3 mol/L，引发剂浓度0.010 mol/L，催化剂浓度0.015 mol/L，反应时间1 h。

Atom Transfer Radical Polymerization of Acrylamide in Ionic Liquid

In the ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate, atom transfer radical polymerization of acrylamide(AM) was completed with benzyl chloride as the initiator and cuprous chloride/2,2′-bipyridine as catalyst. The structural analysis of the resulting polymer via IR spectrometry demonstrates its terminal has —Cl end group. The effects of initiator amount, monomer amount and reaction time on the ATRP of AM are studied, and the results show that when the reaction time is 1.5 h, the conversion is 31.43%, M_n^GPC=4451 and M_w/M_n=1.38 in ionic liquid at 80 ℃. The best conditions of polymerization are as follows:the monomer concentration is 3 mol/L, the initiator concentration is 0.010 mol/L, the catalyst concentration is 0.015 mol/L, and the rection time is 1 h.