The Effect of Aging on the Glass Transition Temperature of some Polymers

Abstract

Three polyphenylene oxides and two polyphenylquinoxalines were subjected to aging in nitrogen and in air, at temperatures below and above their glass transition temperatures, and the change of Tg was determined by DSC. Tg increases of up to 70 deg C were observed. Formation of a second Tg, and widening of the Tg interval in one instance can be connected to the formation of new polymer species during the initial decomposition, and to the formation of crosslinked systems. The effect of aging in air was, as expected, more rigorous than aging in nitrogen.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1977
Accession Number
ADA044532

Entities

People

  • G. F. Ehlers
  • K. R. Fisch

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Aluminum
  • Atmospheres
  • Body Weight
  • Calorimetry
  • Conductive Polymers
  • Controlled Atmospheres
  • Glass Transition Temperature
  • Governments
  • High Temperature
  • Materials
  • Materials Laboratories
  • Phase Transformations
  • Polyphenylenes
  • Scanning
  • Transition Temperature
  • Transitions

Readers

  • Combustion science or combustion engineering.
  • Polymer Science and Engineering.