阳离子聚丙烯酰胺制备条件研究

Study on preparation conditions of cationic polyacrylamide

采用氧化还原剂和偶氮类化合物组成的复合引发体系,通过水溶液聚合法制备丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)的共聚物。研究了氧化还原剂总质量分数、氧化剂与还原剂的质量比、偶氮类化合物的种类和质量分数、引发温度、pH值、单体质量分数等对产物特性粘数的影响。得到的较佳工艺条件:氧化还原剂总质量分数0.015%、氧化剂与还原剂质量比0.7、偶氮类化合物质量分数0.012 5%、引发温度25℃、pH值6.0、单体质量分数45%,在上述条件下,产物特性粘数为12.370 8 dL/g。用红外光谱技术对产物的结构进行表征。

Cationic polyacrylamide was synthesized by aqueous solution polymerization with acrylamide（AM） and methacryloyloxyethyltrimethyl ammonium chloride（DMC） as monomers in compounded initiator system consisting of redox system and azo-compound.The influences of factors,such as mass fraction of oxidant-reductant,the mass ratio of oxidizer to reductant,kind and mass fraction of azo-compound,reaction temperature,pH and mass fraction of monomer,on the intrinsic viscosity of product were examined.The obtained optimum reaction conditions are mass fraction of reductant-oxidant 0.015%,the mass ratio of oxidizer to reductant 0.7,mass fraction of azo-compound 0.012 5%,reaction temperature 25 ℃,pH 6.0 and mass fraction of monomer 45%.Under above conditions,the intrinsic viscosity of product is 12.370 8 dL/g.The structure of obtained product was characterized by FT-IR.