Solvent-driven evolution of block copolymer morphology under 3D confinement

Le Li, Kazuyuki Matsunaga, Jintao Zhu, Takeshi Higuchi, Hiroshi Yabu, Masatsugu Shimomura, Hiroshi Jinnai, Ryan C. Hayward, Thomas P. Russell

研究成果: Article

110 引用 (Scopus)


Nanoparticles with concentric layered structures were generated from a lamellae-forming poly(styrene-b-isoprene) diblock copolymer using controlled precipitation from a tetrahydrofuran/water mixture. Chloroform, a good solvent for both blocks, was used to swell and anneal the nanoparticles suspended in aqueous media. The three-dimensional morphologies of particles were reconstructed by transmission electron microtomography throughout the process of solvent annealing. A transition from concentric lamellae to PI cylinders in a PS matrix occurred upon annealing, presumably due to a slight selectivity of chloroform for PS. These cylindrical microdomains were further divided into PS-core-PI-shell spherical structures in a PS matrix upon extended annealing, a structure that is unique among reported microphase separated morphologies of diblock copolymers.

出版物ステータスPublished - 2010 9 28

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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    Li, L., Matsunaga, K., Zhu, J., Higuchi, T., Yabu, H., Shimomura, M., Jinnai, H., Hayward, R. C., & Russell, T. P. (2010). Solvent-driven evolution of block copolymer morphology under 3D confinement. Macromolecules, 43(18), 7807-7812.