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Environmental effects on graphite fiber reinforced PMR-15 polyimideStudies were conducted to establish the effects of thermo-oxidative and hydrothermal exposure on the mechanical properties of T300 graphite fabric reinforced PMR-15 composites. The effects of hydrothermal exposure on the mechanical properties of HTS-2 continuous graphite fiber composites were also investigated. The thermo-oxidative stability characteristics of T300 fabric and T300 fabric/PMR-15 composites were determined. Flexural strengths of specimens were determined. The useful lifetime of T300 fabric/PMR-15 composites in air at 316 C was found to be about 100 hours. The useful lifetimes in air at 228 and 260 C were determined to be 500 and 1000 hours, respectively. Absorbed moisture was found to reduce the elevated temperature properties of both the T300 fabricate and HTS-2 continuous fiber composites. The moisture effect was found to be reversible. Previously announced in STAR as N81-32194
Document ID
19830051897
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Serafini, T. T.
(NASA Lewis Research Center Cleveland, OH, United States)
Hanson, M. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Composite Materials
Accession Number
83A33115
Distribution Limits
Public
Copyright
Other

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