Pressure-induced structural change of intermediate-range order in poly(4-methyl-1-pentene) melt

Ayano Chiba, Nobumasa Funamori, Kazuya Nakayama, Yasuo Ohishi, Stephen M. Bennington, Sanjay Rastogi, Anuj Shukla, Kazuhiko Tsuji, Mikihito Takenaka

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16 Scopus citations


High-pressure in situ x-ray diffraction and specific-volume measurements on isotactic poly(4-methyl-1-pentene) melt have uncovered abrupt changes in the pressure dependence of microscopic structure as well as that of macroscopic density. The first sharp diffraction peak of the polymer melt, which is related to the intermediate-range order and is explained as resulting from the correlations between main chains, is suppressed at pressures less than 1 kbar. These changes in intermediate-range order show similarities to those seen in liquid-liquid or amorphous-amorphous transitions in simpler small molecule based systems, suggesting that this kind of phenomenon may occur in a wide range of materials. © 2012 American Physical Society.
Original languageEnglish (US)
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number2
StatePublished - Feb 27 2012
Externally publishedYes


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