DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
New Ablative Plastics and Composites, Their Formulation and Processing. Part 1
Summary rept. Feb 1965-1966
HUGHES AIRCRAFT CO CULVER CITY CA AEROSPACE GROUPS
Pagination or Media Count:
Precise processing techniques were used in preparing new ablative plastic composites. This research involved the use of novel heat resistant resins such as cross-linked, branched polyphenylenes para-polyphenylenes, an amide-blocked polybenzimidazole, a phosphonitrilic-modified phenolic, a carborane and a polyimide. Novel materials used as reinforcements included boron fibers, boron nitride fibers, fused silica fabric coated with pyrolytic graphite, polybenzimidazole fibers, rayon-silica fabric, carbon-silica fabric, sapphire wool fibers and silicon carbide fibers. Resin impregnation techniques used in preparing research specimens included spatula coating, dip coating, machine coating in a laboratory treater, Buchner funnel impregnation and dry powder layup. Research specimens were prepared in various geometric configurations depending on their intended ablative characterization. Test specimen geometries included small pellets 34-in. dia by 12-in. thick for hyperthermal reentry screening, subscale rocket nozzles for solid- and liquid-propellant rocket motor screening and hot-gas flow specimens for channel-type hyperthermal tests.
APPROVED FOR PUBLIC RELEASE