Aging of Polymeric Materials.

Abstract

Changes in the microchemistry of the MY720/diaminodiphenyl sulfone epoxy resin system were investigated as a function of simulated environmental aging. Chemiluminescence (CL) was used to monitor changes in the resin system, samples of which were aged at 35 and 65 C at 0% RH (relative humidity), 100% RH, or immersed in liquid water. The reciprocal of the CL is a linear function of the aging interval. The low-temperature thermal decomposition of the cured resin was investigated from 125 to 215 C. The primary decomposition product was propenal. Several other aldehydes were observed; however, they are formed during cure and are not thermal decomposition products. The apparent activation energy for the production of propenal is 67 kJ/mole (16 kcal/mole). Possible mechanisms for the source of this compound are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1982
Accession Number
ADA132250

Entities

People

  • C. J. Wolf
  • D. L. Fanter
  • M. A. Grayson

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Arrhenius Equation
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemistry
  • Composite Materials
  • Decomposition
  • Diffusion Coefficient
  • Energy
  • Gas Chromatography
  • Heat Of Activation
  • Low Temperature
  • Mass Spectrometry
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanics
  • Organic Compounds

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Polymer Science and Engineering.