Effect of post cure time and temperature on the properties of two phenolic-fiber compositesSome effects of post-cure time and temperature on the physicomechanical properties of a phenolic-asbestos and a phenolic-glass composite are studied. The molding and post-curing procedures are discussed along with physical and mechanical test results. It is found that the specific gravity of the panels tested decreased slightly but the hardness always increased with post cure, and that the mechanical properties had different patterns of response to increasing post-cure time and temperature. For tensile properties, strength decreased, modulus increased, and elongation at break exhibited little change. In general, the phenolic-asbestos showed more positive response to post cure than did the phenolic-glass. Mold venting is found to impart better properties to the composites concerned.
Document ID
19760027531
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lucy, M. H. (NASA Langley Research Center Hampton, VA, United States)
Price, H. L. (NASA Langley Research Center Hampton, Va., United States)