原位聚合法制备高透光率韧性PMMA复合树脂的研究

In-situ Preparation and Characterization of Toughened Polymethyl Methacrylate Composite Resin with High Transparency

采用原位聚合法制备PMMA/P(BA-St)/PMMA三层韧性有机玻璃复合树脂,分子设计方法的使用,保持了材料的透明性。考察了韧性粒子粒径、橡胶相组成以及橡胶含量对材料力学和光学性能的影响。借助透射电镜、扫描电镜和动态光散射方法对复合胶乳粒子以及所制材料的形态结构进行了表征。结果表明:橡胶相的折光指数对材料的透光率有明显影响,橡胶相玻璃化温度越低,越有利于增韧。

Three-layer toughened PMMA composite particles were synthesized by in-situ emulsion polymerization. In the presence of PMMA/P(BA-St) latex, PMMA/P(BA-St)/PMMA composite latex was prepared via grafting copolymerization of MMA. Effects of composition and content of rubbery phase as well as particle size on the mechanical properties and optical properties of composite materials were investigated. The morphology of the materials or the composite latex particles were characterized with TEM and SEM.TEM study showed that the composite particles had a core-shell structure, the fractured surface of the notched sample exhibited tough characteristic, and rubber particles were uniformly dispersed in PMMA matrix.