Bulk Modulus of Polyethylene Oxide.

Abstract

A compressibility pressure-temperature cycle has been developed for polyethylene oxide (PEO) by which both the melting and freezing points of this polymer are easily determined. It was found that PEO supercools about 10^C and that the pressure dependencies of the melting and freezing points are approximately the same. Using the pressure dependence of the bulk modulus for PEO, the Gruneisen constant, was calculated to be about 5 and was found to have an anomalous temperature dependence. It is shown that the Anderson-Gruneisen constant, and the Rao constant, are essentially the same parameter and that Wada's Rule holds for transitions in which the volume does not change. (Author, modified-PL)

Document Details

Document Type
Technical Report
Publication Date
Jan 25, 1972
Accession Number
AD0737995

Entities

People

  • Bruce Hartmann
  • R. W. Warfield

Organizations

  • Naval Ordnance Laboratory

Tags

DTIC Thesaurus Topics

  • Bulk Modulus
  • Compressive Properties
  • Critical Temperature
  • Dielectric Polymers
  • Freezing
  • Glass Transition Temperature
  • Gruneisen Parameter
  • Mechanical Properties
  • Phase Transformations
  • Physical Properties
  • Polymers
  • Transition Temperature
  • Transitions

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.