STP768

    Thermophysical Properties Data on Graphite/Polyimide Composite Materials

    Published: Jan 1982


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    Abstract

    Measurements of the thermal properties of HTS/NR 150B2 and HTS/PMR 15 laminates were made over the temperature range 116 to 588 K(−250 to 600°F). Properties investigated included thermal conductivity, thermal expansion, specific heat, and emittance. Layups of [0]n and [0, 45, 90, 135]n were measured in two directions for both materials. The quality of both composite systems was relatively poor. This was typical of polyimide composites at the time. It was expected that, for a given layup and direction, results would be comparable for the two materials. This was the case, with some differences attributable to laminate quality rather than differences in basic materials properties. Erratic variations in thermal expansion measurements from the same specimen were observed at times. Although these were tentatively attributed to laminate quality, additional work is necessary to fully understand this behavior.

    Keywords:

    composite materials, polyimide, graphite fiber, thermal expansion, thermal conductivity, specific heat, emittance


    Author Information:

    Campbell, MD
    Physicist, General Dynamics Convair,

    Burleigh, DD
    Physicist, General Dynamics Convair,


    Paper ID: STP29352S

    Committee/Subcommittee: D30.08

    DOI: 10.1520/STP29352S


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