水溶液聚合法制备阳离子聚丙烯酰胺的研究与表征

Preparation of cationic polyacrylamide through aqueous solution polymerization

对丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)的水溶液聚合进行了研究与分析,采用复配引发体系,成功聚合出了阳离子型聚丙烯酰胺P(DMC-AM)。在成功聚合出所需的聚合物后,分析研究了不同工艺条件对聚合反应的影响;并通过红外光谱和核磁对聚合物的结构进行了确认。得到较好的工艺参数是:在偶氮化合物和氧化还原剂组合的复合体系作用下,阳离子单体量为16%,偶氮引发剂量为0.013%,氧化还原剂用量是0.015%,EDTA 2Na质量分数0.1%,尿素质量分数0.1%,得到特性粘度为10.59 d L/g,溶解时间为20 min。

Cationic polyacrylamide was synthesized by aqueous copolymerization of acrylamide and methacryloxyethyltrimethyl ammonium chloride using complex initiation system. Also discussed the influence of the reaction conditions on the viscosity of the polymer,and by IR and NMR structure of the polymer was confirmed. The results shows that the best conditions are ： in the composite system azo compounds and redox effect of the combination,the consumption of monomer is 16% ,the amount used of azo initiators is 0. 013% ,the amount of oxidation-reduction agent is 0.015% ,0.1% of the mass fraction of EDTA 2Na and urea,a maximum viscosity of 10.59 dL/g is obtained,the dissolution time is 20 rain.