Gas Solubility in Glassy Polymers - A Correlation with Excess Enthalpy

Abstract

Solubility coefficients for CO2, Ar and CH4 in polystyrene (PS) films with glass transition temperatures (Tg) of 52 to 107 C were measured in a pressure decay sorption apparatus at 1 atm over a temperature range of 20 to 90 C. The gas solubility at 30 C increased as the Tg of the PS increased; the heat of solution was largest for the PS with the highest Tg. This observed dependence of gas solubility on Tg was analyzed in terms of enthalpy - temperature relationships for glassy polymers. The solubilities for PS samples with different glass transition temperatures converged when comparisons were made based on states of equal enthalpy instead of the temperature of measurement.

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Document Details

Document Type
Technical Report
Publication Date
Oct 23, 1990
Accession Number
ADA228202

Entities

People

  • D. H. Rein
  • R. F. Baddour
  • Robert E. Cohen

Organizations

  • Massachusetts Institute of Technology

Tags

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemistry
  • Classification
  • Dielectric Polymers
  • Engineering
  • Films
  • Glass
  • Glass Transition Temperature
  • Heat Of Solution
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Molecular Weight
  • Polymers
  • Security
  • Transition Temperature

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Polymer Science and Technology