MMA-BA-DMAEMA三元共聚物胶乳的电解质稳定性

ELECTROLYTE STABILITY OF MMA BA DMAEMA TERPOLYMER LATEX

采用间歇及半连续乳液聚合方式，合成得到了甲基丙烯酸甲酯－丙烯酸丁酯－甲基丙烯酸二氨基乙酯三元共聚物胶乳，系统研究了乳化剂类型、复合配比及用量、聚合温度、聚合方式和官能团单体含量对共聚物乳液耐电解质稳定性的影响。试验结果表明，随着乳化剂体系中非离子成分增加，官能团单体含量增多和聚合温度降低，胶乳的耐电解质稳定性增大。半连续乳液聚合所得胶乳的电解质稳定性比间歇聚合得到的胶乳更好，而且随着乳化单体滴加速率的降低，胶乳的电解质稳定性进一步提高。乳化剂用量加大，对胶乳的电解质稳定性无明显的影响。

The terpolymer latex of MMA BA DMAEMA was prepared by batch and semi continuous emulsion polymerization. The effects of the type and concentration of emulsifiers, the polymerization temperature, the feed rate of emulsified monomers and the content of DMAEMA on the electrolyte stability of the latex were studied systematically. The results show that raising the ratio of the nonion emulsifier in the emulsifier mixture, increasing the content of DMAEMA and the polymerization temperature are beneficial to latex′s electrolyte stability. The latex′s electrolyte stability preparing by semi continuous polymerization is better than that preparing by batch polymerization. The reduction of the feed rate of the emulsified monomers is also favorable to the latex′s electrolyte stability. The content of emulsifiers does not influence the latex′s electrolyte stability.