分光光度法研究两性聚丙烯酰胺的水溶性

Study on Water-solubility of Ampholytic Polyacrylamide by Spectrometry Method

利用水溶液聚合合成不同组成的两性聚丙烯酰胺(AM/MADQUAT/NaAMPS),并对其溶液的透光率受NaCl浓度的影响进行了研究,结果表明:净电荷含量较大的两性聚丙烯酰胺溶液在低NaCl浓度下透光率大,溶解性好,而净电荷含量较小的两性聚丙烯酰胺溶液(特别是带有高电荷密度的两性聚丙烯酰胺)在较高的NaCl浓度下,聚合物溶液透光率大,溶解性好。

Copolymer of 2- [ （methacryloyloxy） ethyl] trimethyl- ammonium chloride （MADQUAT） with acrylamide （AM） and sodium-2-acrylamido-2-methyl- propanesulfonate （NaAMPS） had been prepared by free radical polymerization in aqueous solution. The effect of NaCl concentration on solution transmitance was studied. The result shows that：ampholytic polyacrylamides with more net charge had better water-solubility and transmitance at lower NaCl concentration; but ampholytic polyacrylamide with less net charge （especially with higher charge ） had better water-solubility at higher NaC1 concentration.