Secondary Crystallization in Polyethylenes

Abstract

Changes in the phase structure of a set of rapidly crystallizing polyethylenes were studied over a long time period. The density is found to increase with time. Interpretation of the Raman internal mode spectra indicates, however, that the core crystallinity remains constant over this time period. The density changes reflect the fact that the partially ordered interfacial content increases at the expense of the liquid-like region. These continuing studies will set the basis for interpreting changes in properties of crystalline polymers over long-time periods.

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Document Details

Document Type
Technical Report
Publication Date
Jun 23, 1988
Accession Number
ADA197395

Entities

People

  • L. Mandelkern
  • R. G. Alamo

Organizations

  • Florida State University

Tags

DTIC Thesaurus Topics

  • Acquisition
  • Branched Copolymers
  • Chemistry
  • Classification
  • Copolymers
  • Crystallization
  • Dielectric Polymers
  • Experimental Data
  • Military Research
  • Molecular Weight
  • Phase
  • Polymer Chemistry
  • Polymers
  • Procurement
  • Raman Spectra
  • Security
  • United States Government

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics