Accession Number : AD0764630

Title :   Resins for Advanced Reentry Systems Applications.

Descriptive Note : Final rept. 1 Jul 71-31 Jan 73,

Corporate Author : PENNWALT CORP KING OF PRUSSIA PA RESEARCH AND DEVELOPMENT DEPT

Personal Author(s) : Dahl,Gerd H. ; King,James P. ; Block,Peter B.

Report Date : MAR 1973

Pagination or Media Count : 44

Abstract : Metal-loaded carbon and graphite-cloth reinforced composites were prepared from blends of poly(phenylquinoxaline) and poly(metal phosphinates) of zirconium, hafnium, tantalum, lead, or uranium. The flexural strengths of composite samples containing equal weights of the two polymers in the resin phase ranged from 13,000 to 32,000 psi. The corresponding values for laminates in which the resin phase contained 80 per cent of a poly(metal phosphinate) ranged from 4,500 to 17,000 psi. All laminates had low void contents. Pyrolysis of the laminates produced cohesive structures having flexural strengths of 3,000 to 6,000 psi. The strength values increased to 7,000 to 10,000 psi after the samples were reimpregnated with a furfuryl alcohol resin and repyrolyzed. The pyrolysis results are discussed.

Descriptors :   (*COMPOSITE MATERIALS, *INORGANIC POLYMERS), (*REENTRY VEHICLES, COMPOSITE MATERIALS), (*PYROLYSIS, COMPOSITE MATERIALS), CARBON, METALS, PHOSPHORUS COMPOUNDS, HEAT TREATMENT, LAMINATES, MECHANICAL PROPERTIES, COMPATIBILITY

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE