DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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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.
- Polymer Chemistry
- Laminates and Composite Materials