将丙烯酰胺丙基二甲基胺(DMAPAA)和1,3-丙基磺内酯,在55℃下反应20 h,合成了3-(丙烯酰胺丙基二甲胺基)丙磺酸盐(DMAPAAS),将其在盐溶液中与丙烯酰胺(AM)单体进行自由基共聚合反应,获得净电荷为零的磺基甜菜碱型两性离子共聚物P(AM-DMAPAAS);对该两性离子共聚物进行了表征和溶解性评价.研究结果表明,共聚物在NaCl溶液中的粘度比在纯水中的大,在Mg(2+)和Ca(2+)盐溶液中的粘度更大,且随着溶液浓度的增大而增大,表现出明显的反聚电解质溶液性质.升高相同温度,两性离子共聚物的粘度保留率是普通聚丙烯酰胺的1.4倍.
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