表面活性单体AMC_(14)AB在水溶液中的聚合动力学研究  

Studies on the Kinetics of Surface-active Monomer AMC_(14)AB Polymerizaton in Aqueous Solution

作　　者：刘慷慨[1] 高保娇[1] 

机构地区：[1]中北大学化学工程系,太原030051

出　　处：《化学通报》2007年第5期366-370,共5页Chemistry

基　　金：山西省自然科学基金资助项目(94012)

摘　　要：采用溴酸钾-溴化钾法研究了阳离子型表面活性单体(2-丙烯酰胺基)乙基十四烷基二甲基溴化铵(AMC14AB)在水溶液中的聚合动力学,分别考察了引发剂浓度与单体浓度对聚合速率的影响,确定了聚合速率方程,分析了聚合机理,考察了温度对聚合反应的影响,测定了聚合表观活化能。研究结果表明,由于AMC14AB在水溶液中的胶束化行为,使其具有较快的聚合速率,于60℃下聚合,40min内转化率即可达到80%以上;AMC14AB的聚合速率方程为Rp=k[M]0.92[I]0.48,说明链终止为双基终止方式,引发过程与单体无关;聚合表观活化能为80.72kJ/mol。The polymerization kinetics of （2-acrylamido）ethyltetradecyldimethylammonium bromide （AMC14 AB） in aqueous solution has been studied with KBrO3-KBr method. The effects of initiator concentrations, monomer concentrations and temperature on kinetics of AMC14 AB polymerization in aqueous solutions have been studied, the polymerization rate equation was determined, and the polymerization active energy was measured. At the same time the polymerization mechanism was shown. The results indicated that the polymerization rate equation for AMC14 AB is Rp=k[M]^0.92[I]^0.48, which means that the chain termination reaction is according to the bimolecular mode, and the intitate process is independent on monomer concentration, and the apparent polymerization active energy is 80.72kJ/mol. The reaction mechanism can explain the ploymerization process reasonably.

关 键 词：(2-丙烯酰胺基)乙基十四烷基二甲基溴化铵 表面活性单体 聚合动力学 活化能 

分 类 号：O631.5[理学—高分子化学]