Multiple Morphologies and Their Transformation of a Polystyrene‐block‐poly(4‐vinylpyridine) Block Copolymer

Abstract

Summary: We report the multiple morphologies and their transformation of polystyrene‐block‐poly(4‐vinylpyridine) (PS‐b‐P4VP) in low‐alkanol solvents. In order to improve the solubility of polystyrene block in alcohol solvents, the solution of block copolymer sample was treated at a higher temperature, and then the influence of rate of decreasing temperature on multiple morphologies (including spheres, rods, vesicles, porous vesicles, large compound vesicles, and large compound micelles) was observed. The transformation of spheres to rods, to tyre‐shaped large compound micelles, and to sphere‐shaped large compound micelles was also realized. The formation mechanisms of the multiple morphologies and their transformation are discussed briefly.Aggregates of PS‐P4VP formed in butanol by quenching from 110 °C to room temperature.magnified imageAggregates of PS‐P4VP formed in butanol by quenching from 110 °C to room temperature.

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