Poly(methyl methacrylate) (PMMA) latices for organic coating systems were prepared via emulsion polymerization using various emulsifying techniques. The dispersion modes have an important effect on the particle size and particle size distribution (PSD) of polymeric latices during the emulsion polymerization process. The different dispersion modes, such as magnetic stirring, ultrasound, and the combination of magnetic stirring and ultrasound, were examined to prepare particle size small and narrow PSD polymer latex. PMMA latex of size less than 20 nm in diameter and narrow PSD was successfully produced using the probe ultrasound method. By modifying the amplitude, temperature, and duration of the ultrasound probe and surfactant/water ratio, the optimal ultrasound conditions for the microemulsion polymerization were determined. This research provides new insights into the relationship between the dispersion modes and the colloidal properties of latex, which may offer more effective and simpler routes to prepare latices with fast polymerization rate and high conversion.

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中文翻译：

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分散技术对甲基丙烯酸甲酯乳液聚合的影响

通过使用各种乳化技术的乳液聚合，制备了用于有机涂料体系的聚（甲基丙烯酸甲酯）（PMMA）胶乳。在乳液聚合过程中，分散模式对聚合物胶乳的粒径和粒径分布（PSD）具有重要影响。检查了不同的分散模式，例如磁力搅拌，超声，以及磁力搅拌和超声的组合，以制备粒径小而窄的PSD聚合物胶乳。使用探针超声方法成功生产了直径小于20 nm且PSD窄的PMMA乳胶。通过改变超声探头的振幅，温度和持续时间以及表面活性剂/水的比例，确定了微乳液聚合的最佳超声条件。

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