Pressure-induced amorphization and disordering on cooling in semi-crystalline polymers; calorimetric evidence for inverse melting in one component system

S. Rastogi, G. Hohne, A. Keller

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report some unusual phase behaviour, of general implication for condensed matter, on the polymer poly-4-methyl pentene-1 (P4MP1) induced by changes in pressure (P) and temperature (T), as observed by in-situ X-ray diffraction and high pressure DSC. Upon increasing pressure beyond a threshold value, the polymer, crystalline at ambient conditions, loses its crystalline order isothermally. The process is reversible. This behaviour is observed in two widely separated temperature regions, one below the glass transition temperature (
Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMRSWarrendale, PA, United States
Pages467-472
Number of pages6
StatePublished - Dec 1 1998
Externally publishedYes

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