摘要
系统研究了丙烯酰胺(AM)与二甲基二烯丙基氯化铵(DMDAAC)共聚反应制备阳离子絮凝剂的工艺条件。对聚合温度、引发剂浓度、单体质量分数等对合成目标产物的影响进行了详细探索,并对聚合产物的结构和热行为进行了表征。结果表明,最佳聚合条件为聚合温度55℃,过硫酸铵与甲醛次硫酸氢钠(质量比为7∶3)总质量分数0.0125%,偶氮二异丁脒盐酸盐(V-50)的质量分数0.0125%,单体质量分数35%,阳离子度35%;在最佳工艺条件下,所得阳离子聚丙烯酰胺絮凝剂(CPAM)的分子量为2.5×106,具有良好的絮凝效果。
A cationic polyacrylamide flocculant has been prepared by copolymerization of acrylamide （AM） and dimethyl diallyl ammonium chloride （DMDAAC）. The effects of varying the reaction temperature, concentration of initiator, and monomer mass fraction on the final polymer were investigated. The optimal conditions were found to be as follows： a reaction temperature of 55 ℃, total mass fraction of （NH4 ）2S2Os and NaHSOa ·CH2O2H20 of 0. 0125% , mass ratio of （ NH4 ） 2S2O8/NaHSO3· CH2O·H2O of 7： 3, mass fraction of 2,2＇-azobis（2-methylpropionamide） dihydrochloride （V-50） of 0.0125 % , monomer concentration of 35 % , and cationic degree of 35 %. The resulting cationic polyacrylamide （CPAM） with a molecular weight of 2.5 × 10^6 had a strong flocculation capability. The chemical structure and thermal behavior of CPAM were characterized by FT-IR and TG respectively. The TG results showed that the thermal stability of CPAM was much better than that of AM.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第4期52-57,共6页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
