Accession Number : ADA302520

Title :   Silicone Modified Resins for Graphite Fiber Laminates.

Descriptive Note : Final rept.,

Corporate Author : WESTINGHOUSE RESEARCH AND DEVELOPMENT CENTER PITTSBURGH PA

Personal Author(s) : Frost, L. W. ; Bower, G. M.

PDF Url : ADA302520

Report Date : 28 SEP 1979

Pagination or Media Count : 81

Abstract : When graphite fiber composites are burned, the liberated fibers may settle on electrical apparatus and cause severe damage. This problem can be minimized by bonding the fibers with silicone modified laminating resins that leave a siliceous residual char when they are burned. During the first year of this program, 85 silicone modified resins have been synthesized and evaluated for this application. Included were unsaturated polyesters, thermosetting methacrylates, epoxies, polyimides, and phenolics. Neat resins were judged in terms of Si content, homogeneity, hardness, char formation, and thermal stability. Char formation was estimated by thermogravimetry to 1,000 deg C in air and in N2. Thermal stability was evaluated by isothermal weight loss measurements for 200 hrs in air at three temperatures. jg p.4

Descriptors :   *FIBERS, *LAMINATES, *COMBUSTION, *GRAPHITED MATERIALS, *SILICONE PLASTICS, MEASUREMENT, DAMAGE, POLYMERS, COMPOSITE MATERIALS, ATMOSPHERIC TEMPERATURE, THERMAL STABILITY, CARBON FIBERS, NITROGEN, SILICON, METHACRYLATES, EPOXY COMPOUNDS, WEIGHT REDUCTION, HARDNESS, ELECTRICAL EQUIPMENT, ISOTHERMS, HOMOGENEITY, THERMOSETTING PLASTICS, PHENOLIC PLASTICS, CHARRING, POLYIMIDE RESINS, THERMOGRAVIMETRIC ANALYSIS, POLYESTER FIBERS.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE