Accession Number : ADA306067

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 : ADA306067

Report Date : 21 JUL 1981

Pagination or Media Count : 74

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 deg C and 150 deg 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. jg p3 &4

Descriptors :   *AGING(MATERIALS), *POLYMERS, *COMPOSITE MATERIALS, *CHEMILUMINESCENCE, STRESSES, PEAK VALUES, TEMPERATURE, LOW TEMPERATURE, ENVIRONMENTS, PARAMETERS, TENSILE STRESS, INTENSITY, CHEMICAL REACTIONS, PRECISION, INVERSION, MOISTURE, DECOMPOSITION, ATMOSPHERES, GAS CHROMATOGRAPHY, VAPORIZATION, MICROANALYSIS, MASS SPECTROMETRY, ABRASION.

Subject Categories : Polymer Chemistry
      Physical Chemistry
      Laminates and Composite Materials
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE