Properties of PMR polyimide composites made with improved high strength graphite fibersRecent graphite fiber developments have resulted in high strength, intermediate modulus graphite fibers having improved thermo-oxidative resistance. These improved fibers, obtained from various commercial suppliers, were used to fabricate PMR-15 and PMR-11 polyimide composites. Studies were performed to investigate the effects of the improved high strength graphite fibers on composite properties after exposure in air at 600 F. The use of the more oxidatively resistant fibers did not result in improved performance at 600 F. Two of the improved fibers were found to have an adverse effect on the long-term performance of PMR composites. The influence of various factors such as fiber physical properties, surface morphology and chemical composition are also discussed.
Document ID
19810059199
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Vannucci, R. D. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Composite Materials
Meeting Information
Meeting: National Technical Conference on Materials 1980