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Preparation of hemispherical polymer particles by cleavage of a Janus poly(methyl methacrylate)/polystyrene composite particle.

Authors
  • Yamashita, Nobuko
  • Konishi, Natsumi
  • Tanaka, Takuya
  • Okubo, Masayoshi
Type
Published Article
Journal
Langmuir
Publisher
American Chemical Society
Publication Date
Sep 04, 2012
Volume
28
Issue
35
Pages
12886–12892
Identifiers
DOI: 10.1021/la302442t
PMID: 22867110
Source
Medline
License
Unknown

Abstract

Micrometer-sized, hemispherical particles were successfully prepared as a result of the cleavage of Janus PMMA/PS composite particles by dispersion into acetone/water (9/1-10/0 v/v) media or a THF/water (8/2 v/v) medium. The spherical composite particles having a Janus structure were prepared by the slow evaporation of toluene from homogeneous PMMA/PS/toluene droplets dispersed in an aqueous medium in advance. It was clarified that the difference in affinity between PMMA and PS phases with respect to the media caused the cleavage of the composite particles. This method is expected to be a novel approach to the preparation of nonspherical polymer particles.

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