Accession Number : ADA309604
Title : Effects of Space Environment Factors on the Mechanical, Physical, and Optical Properties of Selected Transparent Elastomers.
Descriptive Note : Technical note,
Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER
Personal Author(s) : Williams, Jerry G. ; Judd, Joseph H.
PDF Url : ADA309604
Report Date : FEB 1971
Pagination or Media Count : 54
Abstract : An experimental investigation was conducted on four different transparent elastomers (silicone, urethane, ethylene-proplylene, and isoprene rubbers) which are candidate matrix materials for flexible windows on spacecraft. The material mechanical properties were measured over a temperature range of from -100 deg C to +100 deg C and after exposure to vacuum, vacuum-heat, and air-heat environments for a period of 30 days. Light transmission through these materials for wavelengths from 230 to 2500 nm was also determined after exposure to environmental conditions. In addition to mechanical and optical properties, measurements were made on specimens to determine vacuum weight loss, gas permeability, the degrading effects of ultraviolet-vacuum exposure, and thermal degradation characteristics.
Descriptors : *RUBBER, *SILICONES, *URETHANES, STRESS STRAIN RELATIONS, LOW TEMPERATURE, PERMEABILITY, SPACE ENVIRONMENTS, EXPOSURE(GENERAL), HIGH TEMPERATURE, TENSILE STRESS, VACUUM, ELASTOMERS, TRANSPARENCE, MATRIX MATERIALS, STRENGTH(MECHANICS), SILOXANES, TRANSMITTANCE, PROPENES, LIGHT TRANSMISSION, VACUUM ULTRAVIOLET RADIATION, WEIGHT REDUCTION, THERMAL CYCLING TESTS, THERMAL DEGRADATION, THERMAL STRESSES, AXIAL LOADS, FLEXIBLE STRUCTURES, MANNED SPACECRAFT, TEARING, DIFFERENTIAL THERMAL ANALYSIS, STRESS RELAXATION, ISOPRENE.
Subject Categories : Elastomers and Rubber
Distribution Statement : APPROVED FOR PUBLIC RELEASE