Abstract: Acrylate microemulsion with solid content of 50%, particle size of 35.6 nm, polydispersity of particle size of 0. 133 at the presence of 1. 5% emulsifier was prepared by seed emulsion polymerization method. Preparation mechanism of the highsolid all acrylicemulison polymerization was studied by the schematic digrams. The results showed that microemulsion can be preparation by conventional emulsion polymerization technology whose mechanism is micellar particle nucleation, where the key is increasing number of creating micelles and the ratio of nucleation in the stage of seed emulsion polymerization, and the levels of emulsifier should be controlled below critical micelle concentration in the stage of monomer charging for exterior laver.

Key words: mechanism, conventional emulsion polymerization, all-acrylate microemulsion

摘要：

采用种子乳液聚合法合成出乳化剂质量分数小于 1.5％，聚合物质量分数大于 50％，粒径为 35.6ｎｍ，多分散性（ＰＤＩ）为 0.133的丙烯酸酯微乳液。本文用框图的方式，阐述了改进的普通乳液聚合法合成乳化剂用量少、固含量高的纯丙纳米乳液的机理。用普通乳液聚合工艺、胶束成核机理，同样可以合成出性能优异的微乳液；种子聚合阶段，采用全滴加法可使形成胶束数目增加，成核率提高，反应结束体系中空胶束数目尽可能减少；外层单体加入阶段，要控制补加乳化剂的量使体系中乳化剂浓度在临界胶束浓度以下。

关键词: 机理, 普通乳液聚合法, 纯丙微乳液