DMDAAC-AM-AA两性聚电解质的合成和表征  

Synthesis and Characterization of DMDAAC/AM/AA Polyampholyte

作　　者：夏正斌[1] 王莹莹[1] 魏丹[1] 宁蕾[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《化学与生物工程》2010年第10期17-20,共4页Chemistry & Bioengineering

摘　　要：以二甲基二烯丙基氯化铵（DMDAAC）、丙烯酸（AA）、丙烯酰胺（AM）为反应单体,采用反相乳液聚合法合成了高单体转化率的水溶性两性聚电解质。傅立叶变换红外光谱（FTIR）分析表明,阴、阳离子单体与AM发生共聚反应生成了三元共聚物;透射电子显微镜（TEM）分析显示,乳胶粒呈规则球形且具有中空结构,粒径大小为150~350 nm;差示扫描量热仪（DSC）分析表明,聚合物在80℃有明显的结晶熔融峰,Tg为58.3℃;等电点分析表明,聚合产物具有明显的两性特征。Water-soluble polyampholyte with high monomer conversion was prepared by inverse emulsion polymerization of dimethyldially ammonium chloride（DMDAAC）,acrylamide（AM） and acrylic acid（AA）.By using Fourier transform infrared（FTIR）,it was shown that terpolymer of DMDAAC/AM/AA was obtained.The analysis results of transmission electron microscope（TEM） indicated that the latex particles of polyampholyte exhibited hollow spherical structure,and the particle size was about 150~350 nm.The curve of differential scanning calorimetry（DSC） revealed that there existed a melting crystallization peak at 80℃,and the glass-transition temperature（Tg） was 58.3℃.The determination results of the isoelectric point showed that the polyampholyte had obvious amphoteric characteristic.

关 键 词：二甲基二烯丙基氯化铵 丙烯酰胺 丙烯酸 两性聚电解质 反相乳液聚合 

分 类 号：TQ317.4[化学工程—高聚物工业] O631[理学—高分子化学]