Accession Number : ADA302035
Title : The Effect of Hypergol Exposure on Polycyanurate Matrix Composites.
Descriptive Note : Technical rept.,
Corporate Author : AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY OPERATIONS
Personal Author(s) : Dickinson, T. J. ; Zaldivar, R. J. ; Kobayashi, R. W.
PDF Url : ADA302035
Report Date : 15 JUL 1995
Pagination or Media Count : 27
Abstract : Polycyanurates are a new class of thermosetting polymers having properties superior to those of epoxies for spacecraft applications. These polymers are gaining wide acceptance due to their lower moisture uptake, reduced outgassing, high glass transition temperature, and excellent resistance to thermally induced microcracks. Polycyanurate composites are being used in current satellite programs and will likely see increased applications in satellite and launch vehicles. It is necessary to determine the compatibility of these composites with spacecraft propellants. This study examines the compatibility between two hypergol rocket propellants (anhydrous hydrazine and nitrogen tetroxide) and polycyanurate composites composed of T-300 fibers and polycyanurate matrices derived from bisphenol A. The mechanical performance of polycyanurate composites was compared to T-3001934 epoxy composites, a current state-of-the-art system for these applications. Fiber and neat resin specimens were tested in addition to the composite systems. The tensile strength of the PAN-based T-300 fibers was not affected by 24-hour exposures in hydrazine and nitrogen tetroxide. jg p.3
Descriptors : *POLYMERS, *COMPOSITE MATERIALS, *THERMOSETTING PLASTICS, MECHANICAL PROPERTIES, TENSILE STRENGTH, SPACECRAFT, HYDRAZINES, HIGH TEMPERATURE, MATRIX MATERIALS, GLASS, REDUCTION, PROPELLANTS, TRANSITION TEMPERATURE, ARTIFICIAL SATELLITES, EPOXY COMPOUNDS, NITROGEN OXIDES, HEAT, MOISTURE, ACCEPTABILITY, LAUNCH VEHICLES, OUTGASSING, TETROXIDES, MICROCRACKING.
Subject Categories : Polymer Chemistry
Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE