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During 1979, General Dynamics conducted an extensive screening program to evaluate new graphite composite materials. V378A, a new modified bismaleimide resin developed by U.S. Polymeric, has met the predetermined screening criteria for harsh aircraft environments [recurrent service to 177°C (350°F) following prolonged exposure to 75 percent mean relative humidity]. During the screening procedure, environmental, mechanical, and processing requirements were examined.
In this report, these criteria, in addition to the V378A results, are reviewed and compared with results for 5208 resin, a widely used epoxy resin. The comparison shows that V378A resin represents an important advancement in composite properties and processibility with widespread application in the manufacture of composite materials.
composites, graphite/polyimide, flex properties, tension properties, environmental effects, thick laminate processing
Engineering specialist senior, General,