Morphology Control of Polymer Microspheres Containing Block Copolymers with Seed Polymerization
Morphology Control of Polymer Microspheres Containing Block Copolymers with Seed Polymerization作者机构：Graduate School of Bio-Applications and Systems Engineering Tokyo University of Agriculture and Technology Koganei Tokyo Japan
出 版 物：《Open Journal of Organic Polymer Materials》 (有机高分子材料期刊（英文）)
年 卷 期：2015年第5卷第2期
页 面：43-50页
主 题：Microsphere Morphology Polymer Blend Block Copolymer Seed Polymerization
摘 要：Microspheres based on binary polymer blend consisting of polystyrene (PSt), poly (methyl methacrylate) (PMMA), block copolymer comprising PSt and PMMA subunits, and ternary polymer blend consisting of PSt, PMMA, and block copolymer were fabricated by a solvent evaporation method, in which a polymer solution in dichloromethane was dispersed in water phase with the aid of a homogenizer to obtain an O/W emulsion followed by solvent evaporation with agitation to solidify the polymer. In the case of ternary blend, the effect of block copolymer content on the morphology of resulting spheres was investigated. Ternary blends afforded the bi-compartmental morphologies, the intermediate morphology between Janus and core-shell, which was confirmed by TEM observation. Seed polymerization of St or MMA was also carried out utilizing the resulting microspheres as seed particles in order to control the shape, and the surface morphology of particles. The particles with snowman-like morphology were obtained by seed polymerization of St using PSt/PMMA binary blend microspheres as seed particles. Surface roughness was controlled by the polymerization of MMA in the block copolymer seed, and that of St in the ternary blend seed.
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