Oriented γ-isotactic polypropylene crystallized at atmospheric pressure

David M. Dean, Richard A. Register

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


A method for crystallizing oriented samples of the γ-phase of isotactic polypropylene (iPP) under atmospheric pressure in the presence of nucleating fibers has been developed. The technique uses iPP grades of high molecular weight and high isotacticity and produces a mixture of α and γ-phase crystals within the matrix of both pitch-based carbon and Kevlar®-reinforced composites. Two-dimensional wide-angle X-ray scattering (WAXS) patterns from these samples show that the content of the γ-phase decreases as the fiber loading in the composites decreases, suggesting that the γ-phase is directly nucleated by the fibers.

Original languageEnglish (US)
Pages (from-to)2821-2827
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number15
StatePublished - Nov 15 1998

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Chemistry
  • Polymers and Plastics
  • Physical and Theoretical Chemistry


  • Composites
  • Epitaxy
  • Gamma phase
  • Polypropylene
  • X-ray scattering


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