Phase transitions in ultraoriented polyethylene fibers under moderate pressures: A synchrotron x-ray study

Dmitry M. Rein, Liron Shavit, Rafail L. Khalfin, Yachin Cohen, Ann Terry, Sanjay Rastogi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The effect of pressure on phase transformations of ultradrawn ultra-high-molecular-weight polyethylene (UHMWPE) fibers was examined by in situ X-ray diffraction measurements with synchrotron radiation. The mesomorphic hexagonal phase was metastable even at a relatively low pressure of about 100 bar. The effect of pressure on the melting transitions was larger than in chain-folded structures. The existence and metastability of the hexagonal phase is the basis of compaction technology of UHMWPE fibers in composite materials.
Original languageEnglish (US)
Pages (from-to)53-59
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume42
Issue number1
DOIs
StatePublished - Jan 1 2004
Externally publishedYes

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