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Multiple Morphologies and Their Transformation of a Polystyrene‐ block ‐poly(4‐vinylpyridine) Block Copolymer
Author(s) -
Liu Libin,
Gao Xiang,
Cong Yong,
Li Binyao,
Han Yanchun
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500679
Subject(s) - micelle , copolymer , polystyrene , materials science , vesicle , quenching (fluorescence) , chemical engineering , polymer chemistry , solubility , polymer , chemistry , aqueous solution , composite material , organic chemistry , fluorescence , optics , biochemistry , membrane , engineering , physics
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.