Accession Number : ADA303132

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 : ADA303132

Report Date : 18 DEC 1980

Pagination or Media Count : 82

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 second year of this program, 23 additional silicone modified resins have been synthesized and evaluated for this application. Included were siloxane-silazane-epoxies, siloxane- imide-epoxies, and unsaturated siloxanes. Further evaluation of resins from the first year was also done. 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 200 deg C. jg p4

Descriptors :   *LAMINATES, *CARBON FIBERS, *GRAPHITED MATERIALS, *SILICONE PLASTICS, MEASUREMENT, DAMAGE, CONDUCTIVITY, AIR, POLYMERS, COMPOSITE MATERIALS, STIFFNESS, THERMAL STABILITY, NITROGEN, SILOXANES, SILICON, EPOXY COMPOSITES, WEIGHT REDUCTION, ELECTRICAL EQUIPMENT, ISOTHERMS, IMIDES, CHARRING, UNSATURATED HYDROCARBONS, THERMOGRAVIMETRIC ANALYSIS.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Organic Chemistry
      Refractory Fibers
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE