阳离子聚丙烯酰胺“水包水”乳液的制备研究

在硫酸铵溶液中,以相对分子质量为7.44×10~5～1.21×10~6的聚甲基丙烯酰氧乙基三甲基氯化铵为分散剂,在偶氮二异丁脒盐酸盐引发剂的作用下,通过分散聚合进行了丙烯酰胺和甲基丙烯酰氧乙基三甲基氯化铵的二元共聚。分别探讨了分散剂浓度、无机盐浓度、单体总浓度及其配比、引发剂浓度、反应温度等对分散聚合的影响,找出了各影响因素之间的协同规律,最终确定出最佳的合成条件和体系配比。在上述条件下制备出颗粒分散性较好、流动性较好、稳定性较高、特性黏数及黏均分子量较高的阳离子聚丙烯酰胺＂水包水＂乳液。

Study on the"water-in-water"emulsion preparation of cationic polyacrylamide

In the ammonium sulfate solution,polytrimethylaminoethyl methacrylate methyl chloride was used as dispersing agent,whose molecular weight is 7.44×10~5～1.21×10~6.Under the action of initiator 2,2 ＇-azobis （2-methylpropionamide） dihydrochloride,acrylamide and dimethylaminoethyl methacrylate methyl chloride copolymerization was carried out by dispersion polymerization.The effects of dispersing agent concentration,inorganic salt concentration,total monomer concentration,monomer molar ratio,initiator concentration and reaction temperature on the dispersion polymerization were investigated,and the collaborative law between each factor was identified. The optimal synthetic conditions and system proportion were determined.Under these conditions,the prepared cationic polyacrylamide ＂water-in-water＂ emulsion has better particle dispersivity,liquidity,stability and higher intrinsic viscosity,viscosity-average molecular weight.