将由水相引发部分预聚的苯乙烯(St)浓乳液与部分预聚的甲基丙烯酸丁酯(BMA)浓乳液混合,并使混合物继续聚合至完全,利用单体在不同乳胶粒间的扩散所生成的两种准嵌段共聚物来降低聚苯乙烯与聚甲基丙烯酸丁酯两相间的界面张力,使之起到增容作用,改善聚苯乙烯／聚甲基丙烯酸丁酯合金性能,获得自增容合金。
Two concentrated emulsions in water were prepared: one from butyl methacrylate(BMA) and other from styrene(St). After the concentrated emulsions were partially pre-polymerized, they were mixed and subjected to complete polymerization. Because monomers diffused across water into cells each other during the subsequent polymerization, two types of quasi-block copolymers were generated. Such quasi-block copolymer as compatibilizers existed at the interfaces and decreased the interfacial tension. The compatibilization made the domain of the dispersed phase finer and the interface between the matrix and the toughener smeared and thus improved the combination of the two components. As a result, auto-compatible blend, possessing excellent toughness, was obtained.
参考文献
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