A previous study demonstrated that relatively monodispersed particles of poly(styrene-co-acrylonitrile) (SAN) can be prepared through the phase inversion of water-in-oil (W/O) to oil-in-water (O/W) emulsions containing a water-soluble organic solvent as the oil phase. In this study, we apply the phase inversion method to binary polymer blend systems, i.e., SAN and polystyrene (PS), poly(styrene-co-butadiene) (PSB), or polycyclohexylmethacrylate (PCM). The size distributions of particles produced from the binary polymer blends of SAN + PS and SAN + PSB, but not of SAN + PCM, are carried out by adding the distributions of the original single polymers, where a single SAN system produces small particles (below 1 μm), while the main products of the single PS and PSB systems are large particles with broad size distributions. After small particles below 2 μm and large particles above 10 μm are collected by filtrating as-prepared particle dispersions, FT-IR analysis of the collected particles reveals that the small particles contain mainly SAN and the large particles are enriched with PS or PSB. Accordingly, we demonstrate that the phase inversion method fulfills a fractionation potential of binary polymer blends into the original components based on particle size difference.

先前的研究表明，聚单分散相对的颗粒（苯乙烯-共-丙烯腈）（SAN）可通过水包油（W / O）的相位反转，以油包水（O / W）乳液来制备含有水溶性有机溶剂作为油相。在这项研究中，我们应用倒相法二进制聚合物共混物体系，即，SAN和聚苯乙烯（PS），聚（苯乙烯-共-丁二烯）（PSB）或聚甲基丙烯酸环己酯（PCM）。由SAN + PS和SAN + PSB的二元聚合物混合物（而不是SAN + PCM）生产的颗粒的尺寸分布是通过添加原始单一聚合物的分布来进行的，其中单个SAN系统会产生小颗粒（如下所示） 1μm），而单个PS和PSB系统的主要产品是具有宽尺寸分布的大颗粒。通过过滤制备的颗粒分散液收集小于2μm的小颗粒和大于10μm的大颗粒后，对收集到的颗粒进行FT-IR分析表明，小颗粒主要包含SAN，大颗粒富含PS或PSB。因此，