Synthesis of Improved Phenolic and Polyester Resins.
ACUREX CORP/AEROTHERM MOUNTAIN VIEW CA AEROSPACE SYSTEMS DIV
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Thirty-seven addition cured phenolic resin compositions were prepared and tested for their ability to provide improved char residues and moisture resistance over state-of-the-art epoxy resin composite matrices. Cyanate, epoxy novolac and vinyl ester resins were investigated. Char promoter additives were found to increase the anaerobic char yield at 800 deg C of epoxy novolacs and vinyl esters. Moisture resistant cyanate and vinyl ester compositions were investigated as composite matrices with Thornel 300 graphite fiber. A cyanate composite matrix provided state-of-the-art composite mechanical properties before and after humidity exposure and an anaerobic char yield of 46 percent at 800 deg C. The outstanding moisture resistance of the matrix was not completely realized in the composite. Vinyl ester resins showed promise as candidates for improved composite matrix systems. jg p3
- Organic Chemistry
- Polymer Chemistry
- Laminates and Composite Materials