低分子量聚丙烯酰胺的阳离子改性  

Cationic Modification of Lower Molecular Weight Polyacrylamide

作　　者：张彦昌[1] 王冬梅[1] 李天仚[1] 赵献增[1] 

机构地区：[1]河南省精细化工重点实验室,河南郑州450002

出　　处：《化工技术与开发》2012年第4期1-2,共2页Technology & Development of Chemical Industry

基　　金：河南省杰出人才基金项目(114200510020)

摘　　要：采用基团转化法合成了低分子量的阳离子聚丙烯酰胺,以自制固含量40%的聚丙烯酰胺水溶液为基本原料,运用Mannich反应使聚丙烯酰胺与甲醛和二氰二胺分二步分别在碱性和酸性的水介质中反应生成低分子量的阳离子聚丙烯酰胺PAM.MG。第一步反应条件：pH为10.5~11.0,温度为45℃,第二步反应条件：pH为2.5~3.0,温度为50℃。运用红外光谱、元素分析对两步反应所得到的产物PAM.M和PAM.MG进行鉴定和表征,确定该实验两步反应均得到了目标产物。Cationic polyacrylamide was prepared by modification of polyacrylamide with formaldehyde and dicyamodiamide,using 40% polyacrylamide that prepared by myself as the basic material.The reaction temperature and pH value of PAM with formaldehyde were 45℃ and 10.5~11.0,the reaction temperature and pH value of PAM.M with dicyamodiamide were 50℃ and 2.5~3.0.The structure and composition of both PAM.M and PAM.MG were identified by FT-IR spectrum and elementary analysis.

关 键 词：二氰二胺 改性 阳离子聚丙烯酰胺 

分 类 号：TQ322.44[化学工程—合成树脂塑料工业]