【摘要】 以丙烯酰胺（AM）和甲基丙烯酰氧乙基三甲基氯化铵（DMC）为共聚单体,采用氧化还原/偶氮化合物复合引发剂体系在水溶液中进行自由基聚合,合成了阳离子型聚丙烯酰胺聚合物（CPAM）。系统研究了反应条件对反应产物的影响,用红外光谱对CPAM的结构进行了表征。结果表明,制备较高分子量CPAM的优化工艺参数为:单体总质量分数35%（AM∶DMC=3∶1）,氧化还原引发剂质量分数0.06%（（NH₄）₂S₂O₈∶NaHSO₃=1∶1）,偶氮类引发剂质量分数0.09%,助溶剂质量分数1.5%,络合剂质量分数1.5%。在此优化条件下,所得CPAM的分子量达1.2×10⁶,对蒙脱土模拟废水的絮凝效果良好,经其处理后的模拟废水透光率达到99.3%。更多还原

【Abstract】 The cationic polyacrylamide（ CPAM） was synthesized via aqueous free radical polymerization from acrylamide（ AM） and methacryloxyethyl trimethyl ammonium chloride（ DMC） monomers under redox/azo co-initiating system. The yielding CPAM was characterized by FT-IR and its structure was proved.The reaction conditions were investigated systematically and optimized.The results showed that the optimal synthetic conditions for producing higher molecular weight CPAM were as follows: the monomer weight percentage was 35%（ AM ∶ DMC = 3 ∶ 1）,the amount of redox initiator was 0. 06 wt%（（ NH₄）₂S₂O₈∶ NaHSO₃= 1 ∶ 1）,azo initiator concentration was 0. 09 wt%,the mass fractions of co-solvents and complexing agent were 1. 5% and 1. 5%,respectively.Under the conditions,the CPAM with a molecular weight of 1. 2×10⁶ was synthesized,and it has well flocculating property on montmorillonite simulated wastewater,the transmittance of the wastewater is up to 99. 3% by CPAM treatment.更多还原