Accession Number : ADD009392

Title :   Diethynylbenzene-Ethylnylpyrene Copolymers.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Bilow,Norman

Report Date : 13 Apr 1982

Pagination or Media Count : 6

Abstract : This invention relates to aromaticacetylene compounds and their utilization as ablative materials for re-entry vehicles. In a more particular aspect, this invention relates to the synthesis of diethynylbenzene-ethynylpyrene copolymers and their use as high char yielding matrix resins for carbon-carbon composites. The increased use and interest in the operation of re-entry vehicles has generated a considerable research effort in an attempt to develop structural materials that exhibit high strength and resistance to the stresses and strains encountered by space vehicles during their re-entry regime. Rocket and missile components, such as turbine blades, nozzles, vanes, partitions and, especially, nose cones, are very vulnerable to the stress and strain encountered during their re-entry environment. These components require structural materials capable of surviving those stresses and the elevated temperatures occurring during re-entry.

Descriptors :   *Patents, *Copolymers, *Synthesis(Chemistry), *Ethylenes, *Benzene compounds, Carbon carbon composites, High strength, Nose cones, Ablative materials, Matrix materials, Guided missile components, Turbine blades, Inventions

Subject Categories : Polymer Chemistry
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE