原子转移自由基聚合法（ATRP）制备聚丙烯酰胺

摘要

The atom transfer radical polymerization（ATRP） of acrylamide in N,N-dimethyl formamide initiated by benzyl chloride and catalyzed by ferrous chloride/triphenyl phosphine was reported.The effects of the feed ratio of FeCl2 to PPh3,polymerization temperature and time on the monomer conversions and molecular weights of polymers were investigated.The results showed that molecular weights of polyacrylamide increased linearly with monomer conversion at the condition of /[C6H5CH2Cl]// equal to 100/1/0.5/1 and 80 ℃.There was nearly line correlation between ln0 and polymerization time.The temperature had greater influence on polymerization characteristics.%以苄基氯为引发剂,氯化亚铁为催化剂,三苯基膦为配体研究了丙烯酰胺在N,N-二甲基甲酰胺中的原子转移自由基聚合,考察了聚合时间、催化剂与配体的摩尔配比、温度等因素对单体转化率、分子量的影响。结果表明：80℃下,[AM]/[C6H5CH2Cl]/[FeCl2]/[PPh3]=100/1/0.5/1时,聚丙烯酰胺分子量随单体转化率增加线性增大,ln[[MM]]0与聚合时间呈线性关系,温度对聚合特征有较大影响。