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Characterization of PMR-15 polyimide composition in thermo-oxidatively exposed graphite fiber compositesThe contributions of individual resin components to total resin weight loss in 600 F air aged Celion 6000/PMR-15 polyimide composites were determined from the overall resin weight loss in the composite by chemically separating the PMR-15 matrix resin into its monomeric components. The individual resin components were also analyzed by spectroscopic techniques in order to elucidate curing and degradation mechanisms of the PMR-15 matrix resin. The isothermal weight loss of the individual resin components during prolonged 600 F thermo-oxidative aging of the composite was correlated to the changes observed in the Fourier Transform infrared spectra and Fourier Transform nuclear magnetic resonance spectra of the individual resin components. The correlation was used to identify the molecular site of the thermo-oxidative changes in PMR-15 polyimide matrix resin during 600 F curing the prolonged 600 F thermo-oxidative aging.
Document ID
19800020023
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Alston, W. B. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1980
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-TM-81565
AVRADCOM-TR-80-C-10
E-527
Report Number: NASA-TM-81565
Report Number: AVRADCOM-TR-80-C-10
Report Number: E-527
Meeting Information
Meeting: Natl. SAMPE Tech. Conf.
Location: Seattle
Start Date: October 7, 1980
End Date: October 9, 1980
Accession Number
80N28524
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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