一种阴-非离子型反应性乳化剂在乳液聚合中的应用

Application of a Reactive Emulsifier with Anionic and Nonionic Groups in Emulsion Polymerization

以马来酸酐、脂肪醇聚氧乙烯醚(AEO-7)为原料,合成了一种阴-非离子型反应性乳化剂(MA-7-Na)。探究了其在聚丙烯酸酯乳液聚合中的应用效果,并对聚合工艺条件进行优化。结果表明:采用MA-7-Na所得乳液的聚合稳定性、Ca2+稳定性和胶膜的耐水性都较好;最佳聚合工艺条件为:MA-7-Na用量5wt%,MAA用量1 wt%,保温时间1.5h。分别采用红外光谱和透射电镜对乳液的结构和形貌进行表征。

A reactive emulsifier with anionic and nonionic groups was synthesised starting from maleic anhydride and fatty alcohol ethoxylates(AEO-7). The application effect of MA-7-Na in acrylate emulsion polymerization was studied, and the polymerization process conditions were optimized. The results showed that the polymerization stability of the resulting emulsion, the stability against the calcium ion and the water resistance of the latex film emulsified by MA-7-Na were excellent, and the optimum conditions were obtained as follows: the dosage of MA-7-Na was wt%, the dosage of MAA was wt%, the soaking time was 1.5h. The structure and morphology of polymer emulsion were characterized by infrared spectroscopy and transmission electron microscopy respectively.