以PAAS为模板AM与DMC的模板共聚合反应

Template Copolymerization of AM and DMC in the Presence of PAAS

在水溶液中以聚丙烯酸钠(PAAS)为模板,进行了丙烯酰胺(AM)与2-甲基丙烯酰氧乙基三甲基氯化铵(DMC)的共聚合反应。研究了其聚合动力学,并对模板共聚物的序列结构进行了表征,最后对其进行了絮凝性能评价。结果表明:聚合反应符合模板聚合Ⅰ型机理,聚合反应速率分别与单体浓度和引发剂浓度的1.63和1.64次方成正比,此种共聚物与无模板参与聚合的普通共聚物相比具有更长的DMC序列长度,对高岭土悬浮液的絮凝沉降速率优于普通共聚物。

The template copolymerization of aerylamide （AM） and 2-methacryloyloxyethyltrimeth- lammonium chloride （DMC） was studied using poly sodium acrylate （PAAS） as template in aqueous solu- tion. The polymerization kinetics, sequence distribution and the flocculant performance were investigated. The results show that the copolymerization under the effect of PAAS is in accordance with type I template mechanism. The rate of copolymerization is found to be proportional to the concentrations of monomers and initiator with exponents of 1.63 and 1.64. The presence of PAAS significantly increases the probability for long sequence of DMC in the copolymer. The setting rate of Kaolin suspensions flocculated by the copolymer obtained from template polymerization is much faster than the one flocculated by the copolymer synthesized without PAAS.