AbstractHere, we report the morphological transition of a phase-separated structure from core–shell to Janus morphology in droplets consisting of a poly(4-butyltriphenylamine) (PBTPA)/poly(methyl methacrylate) (PMMA) blend solution, induced by UV light irradiation. We obtained a phase-separated structure formed by the evaporation of the solvent from polymer solution droplets dispersed in an aqueous solution containing a surfactant. The rate of transition decreased with increasing polymer concentration and diameter of the droplet. It was also found that the transition was caused by UV light with a wavelength of 365 nm, which is mainly absorbed by PBTPA, indicating that this phenomenon is triggered by PBTPA. When the droplet was heated to 75 °C, no transition was observed.UV light irradiation causes the unexpected structural transition from core–shell to Janus in droplets consisting of a poly(4-butyltriphenylamine) (PBTPA)/poly(methyl methacrylate) (PMMA) blend solution. We obtained a phase-separated structure formed by the evaporation of the solvent from polymer solution droplets dispersed in an aqueous solution containing a surfactant. It was also found that the transition was caused by UV light with a wavelength of 365 nm, which is mainly absorbed by PBTPA, indicating that this phenomenon is triggered by PBTPA.

中文翻译：

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紫外光照射下相分离的 PBTPA/PMMA 溶液液滴从核壳转变为 Janus 形态

摘要在这里，我们报告了在由聚（4-丁基三苯胺）（PBTPA）/聚（甲基丙烯酸甲酯）（PMMA）混合溶液组成的液滴中，由紫外光诱导的相分离结构从核-壳到 Janus 形态的形态转变。辐照。我们通过从分散在含有表面活性剂的水溶液中的聚合物溶液液滴中蒸发溶剂而获得了相分离结构。转变速率随着聚合物浓度和液滴直径的增加而降低。还发现跃迁是由波长为 365 nm 的紫外光引起的，主要被 PBTPA 吸收，表明这种现象是由 PBTPA 引发的。当液滴加热到 75 °C 时，没有观察到转变。紫外线照射导致由聚（4-丁基三苯胺）（PBTPA）/聚（甲基丙烯酸甲酯）（PMMA）混合溶液组成的液滴中从核-壳到 Janus 的意外结构转变。我们通过从分散在含有表面活性剂的水溶液中的聚合物溶液液滴中蒸发溶剂而获得了相分离结构。还发现跃迁是由波长为 365 nm 的紫外光引起的，主要被 PBTPA 吸收，表明这种现象是由 PBTPA 引发的。