New Ablative Plastics and Composites, Their Formulation and Processing. Part 2
Summary rept. Feb 1966-Feb 1967
HUGHES AIRCRAFT CO CULVER CITY CA AEROSPACE GROUPS
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Precise processing techniques were used in preparing new ablative plastic composites. This research involved the use of novel heat resistant resins such as crossed-linked, branched polyphenylenes para-polyphenylenes, and amide-blocked polybenzimidazole, a phosphonitrilic-Modified phenolic, a polyimide, a chrome based metal organic phenolic, a tungsten based metal organic phenolic and a polyphenylene oxide. Novel materials used as reinforcements included boron fibers, boron nitride fibers, and pyrolytic graphite fibers. Resin impregnation techniques used in preparing research specimens included spatula or brush coating, dip coating, 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-inch diameter by 12-inch 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.
- Laminates and Composite Materials