Accession Number : ADA111625

Title :   Aging of Polymers and Composites.

Descriptive Note : Final rept. 21 Apr 80-21 Jul 81,

Corporate Author : MCDONNELL DOUGLAS RESEARCH LABS ST LOUIS MO

Personal Author(s) : Wolf,C J ; Fanter,D L ; Grayson,M A

PDF Url : ADA111625

Report Date : 21 Jul 1981

Pagination or Media Count : 72

Abstract : The microchemical changes produced during the aging of the resin system, MY720 (Ciba-Geigy) cured with Eporal (Ciba-Geigy), were studied by the combined use of chemiluminescence, vaporization gas chromatography (and mass spectrometry), precision abrasion mass spectrometry, and stress mass spectrometry. Resin coupons were aged at ambient, 85 C and 150 C in dry and moist atmospheres in the presence and absence of an external tensile stress (up to 50% of the ultimate tensile stress). The chemiluminescence peak intensity which occurs at a temperature change was found to be an inverse function of the aging time for a given set of environmental parameters. Propenal, a low-temperature decomposition product of the resin, may be related to the chemiluminescence and aging processes.

Descriptors :   *Polymers, *Fiber reinforced composites, *Aging(Materials), Epoxy resins, Microanalysis, Age hardening, Chemiluminescence, Mass spectrometry, Abrasion, Gas chromatography, Tensile stress, Vaporization, Thermal properties, Environmental impact, Decomposition, Humidity

Subject Categories : Polymer Chemistry
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE