Pressure-induced structural transition in an one-component polymer poly(4-methyl-1-pentene) in its melted state

ORAL

Abstract

Liquid-liquid transitions or amorphous-amorphous transitions are well-known in systems with small molecular or structural units, such as those seen in water, phosphorus, and silica glass. We studied pressure-induced structural change for isotactic poly(4-methyl-1-pentene) in its melted state, and found a structural transition for this one-component polymer melt. High-pressure in-situ x-ray diffraction and specific-volume measurements on the polymer melt have uncovered discontinuities in the pressure dependences of microscopic structure as well as those of macroscopic density. The results suggest the occurrence of a liquid-liquid phase transition.

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Authors

  • Ayano Chiba

    • Keio University, Japan

  • Nobumasa Funamori

    • University of Tokyo, Japan

  • Kazuya Nakayama

    • University of Tokyo, Japan

  • Yasuo Ohishi

    • Japan Synchrotron Radiation Research Institute (SPring-8), Japan

  • Stephen M. Bennington

    • Rutherford Appleton Laboratory, UK

  • Sanjay Rastogi

    • Loughborough University, UK

  • Anuj Shukla

    • European Synchrotron Radiation Facility, France

  • Kazuhiko Tsuji

    • Keio University, Japan

  • Mikihito Takenaka

    • Kyoto University, Japan