Abstract
AbstractThe films of the binary mixtures composed of poly(4‐vinylpyridine) (P4VP) and polystyrene (PSt) microgels were prepared by casting the deionized aqueous solutions of mixtures at room temperature. The regularity of the particle arrangement was evaluated from the distribution of interparticle contact angle (ICA) formed by three nearest neighbouring particles by using scanning electron micrographs (SEM). It was found that the particles showed hexagonal closed packing, and formed interesting alternating structures when the diameters of two compositions were almost the same. On the other hand, it was found from the distribution of ICA that the arrangements among the particles of same compositions (among P4VP microgels or among PSt microgels) became more ordered as the ratio of the diameters (large particle to small one) became larger while those among the particles of different compositions (among P4VP and PSt microgels) were relatively ordered and the effect of the ratio of the diameters was not so apparent.
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