STP787

    Mechanical Characteristics of T300-6K/V378A Graphite/Polyimide

    Published: Jan 1982


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    Abstract

    Mechanical characteristics of T300-6K/V378A, a new graphite-fiber-reinforced modified bismaleimide, have been determined. Tests were conducted on batches of material incorporating normal changes in resin and fiber constituent lots. Both fiber-dominated and resin-dominated properties were determined for dry and moisture-conditioned specimens. Investigations included 0-deg and 90-deg flex and tension tests, 0-deg compression, ±45 tension, and bolt-bearing properties. These typical properties show that this graphite/polyimide composite is structurally equivalent to graphite/epoxy for room-temperature dry conditions. However, humidity-conditioned graphite/polyimide has much better mechanical properties than graphite/epoxy at temperatures of 129°C (265°F) or above.

    A review of these properties and a comparison with typical properties of graphite/epoxy are presented. The methods of testing are also reviewed, with particular attention to methods of environmental conditioning and testing of moisture-saturated specimens. For elevated temperature properties, these testing procedures involved use of special setups and apparatus to achieve rapid heating of the test section of each specimen. These procedures were required to ensure that the mechanical test specimens did not dry out prior to completion of the test.

    Keywords:

    graphite/polyimide, graphite/epoxy, bismaleimide, mechanical properties, humidity effects, temperature effects, test methods


    Author Information:

    McKague, L
    Engineering Specialist Senior, Engineering Specialist, and Senior Engineering Chemist, General Dynamics, Fort Worth, Tex.

    Reynolds, JD
    Engineering Specialist Senior, Engineering Specialist, and Senior Engineering Chemist, General Dynamics, Fort Worth, Tex.

    Fruit, J
    Engineering Specialist Senior, Engineering Specialist, and Senior Engineering Chemist, General Dynamics, Fort Worth, Tex.


    Paper ID: STP28475S

    Committee/Subcommittee: D30.08

    DOI: 10.1520/STP28475S


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