【作者】 陈强； 项盛； 张文德； 王丕新；

【Author】 Qiang Chen, Sheng Xiang, Wende Zhang, Pixin Wang* Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022,Chang Chun, Jinlin, China

【机构】 中国科学院长春应用化学研究所；

【摘要】 以N-乙烯基甲酰胺和丙稀酸钠为单体,以VA-044为引发剂合成了共聚物聚(N-乙烯基甲酰胺-丙稀酸钠),并在碱条件下水解制得了两性聚电解质聚(乙烯胺—丙烯酸钠)。共聚物的结构通过1HNMR得以确认,聚电解质的等电点通过浊度滴定得到。进料比60:40的共聚物有一不溶的pH值区间,等电点为pH7.7,且曲线是不规则的梯形,等电点是pH7.7,而10:90的共聚物则在整个pH值区间都时溶解的,表明当共聚物的组成发生变化时,两性聚电解质的性质也有较大的变化。更多还原

【Abstract】 Poly(vinylamine-sodium acrylate) was obtained from the hydrolization of Poly(N-vinylformamide-sodium acrylate) which was synthesized by free radical polymerization of N-vinylformamide and sodium acrylate, using VA-044 as initiator. The structure of the copolymers was characterized by 1H NMR, and the isoelectric point of the polyampholyte was acquired from turbidity titration. It found that the polyampholyte fed in 60:40 has an insoluble region, the isoelectric point is pH 7.7, and the shape of the curve is not perfect trapezoidal, and it exhibits two maxima and one minimum, which didn’t find in the copolymers which were fed in 10:90. It is inferred that the properties of copolymers have changed much with the change of feed ratio.更多还原