Environmental Effects on Graphite Fiber Reinforced PMR-15 Polyimide | Zendy

TT Serafini | Zendy; MP Hanson | Zendy

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Environmental Effects on Graphite Fiber Reinforced PMR-15 Polyimide

Author(s) -

TT Serafini,

MP Hanson

Publication year - 1982

Publication title -

nasa sti repository (national aeronautics and space administration)

Language(s) - English

Resource type - Book series

DOI - 10.1520/stp29349s

Subject(s) - materials science , composite material , graphite , moisture , flexural strength , polyimide , fiber , hydrothermal circulation , layer (electronics) , seismology , geology

Studies 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 from composites in the as-fabricated and environmentally exposed conditions were determined. The useful lifetime of T300 fabric/PMR-15 composites in air at 316°C was found to be about 100 h. The useful lifetimes in air at 228 and 260°C were determined to be 500 and 1000 h, respectively. Absorbed moisture was found to reduce the elevated temperature properties of both the T300 fabric and HTS-2 continuous fiber composites. The moisture effect was found to be reversible.

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