Phase Transition from Disordered Sphere to Hex-Cylinder via Transient Ordering into Bcc-Sphere in SIS Triblock Copolymer

DOI Web Site 被引用文献5件
  • Norihiro Sota
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
  • Naoki Sakamoto
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
  • Kenji Saijo
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan
  • Takeji Hashimoto
    Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan

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説明

We have investigated the ordering processes from the disordered-sphere phase (designated hereafter disordered sphere), where spherical microdomains exist but they have only a short-range liquidlike order, to the phase of hexagonally packed cylindrical microdomains (designated hereafter hex-cylinder), induced by the temperature drop (T-drop). The block copolymer studied is a compositionally asymmetric polystyrene-block-polyisoprene-block-polystyrene triblock copolymer and forms disordered sphere above the order−disorder transition temperature involving the lattice disordering−ordering transition temperature, TODT or TLDOT, spheres in a body-centered-cubic lattice (designated hereafter bcc-sphere) below TLDOT but above the order−order transition (OOT) temperature, TOOT, and hex-cylinder below TOOT. The ordering processes induced by T-drop were explored in situ and at a real time by using time-resolved small-angle X-ray scattering, and the transient microdomain structures developed during the ordering proces...

収録刊行物

  • Macromolecules

    Macromolecules 36 (12), 4534-4543, 2003-05-23

    American Chemical Society (ACS)

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