HOMOGENEITY OF DIISOCYANATE-LINKED ELASTOMERS
Homogeneity of diisocyanate-linked elastomers
ELASTOMER↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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STRESS RELAXATION OF FLUOROCARBON ELASTOMERS DURING GAMMAIRRADIATION
Stress relaxation of fluorocarbon elastomers during gamma irradiation
GAMMA RADIATION↗
EFFECTS OF SPACE ENVIRONMENT UPON PLASTICS AND ELASTOMERS
Effects of vacuums, ionization, electromagnetic radiation and meteoroids on plastics, elastomers and organic coatings used in space vehicles
RADIATION EFFECT↗
Low-temperature elastic behavior of fourteen compounded elastomers
Low temperature elastic properties of elastomers - modulus of rigidity, brittle temperature, and youngs modulus.
ELASTIC PROPERTY↗
Comparison of two instruments for determining hardness of elastomers
Comparative analysis of two commercial instruments used for measuring hardness of elastomers
MEASURING APPARATUS↗
Rupture of elastomers and propellants
Rupture or fracture initiation of elastomers and propellants
FRACTURE↗
Automatic extensometer for elastomers
Extensometer for measuring elongation of elastomer and electronically recording data on testing instrument chart
EXTENSOMETER↗
Curing environment and homogeneity of diisocyanate-linked elastomers.
Curing environment effect on homogeneity of diisocyanate linked elastomers determined from shore hardness, viscosity and solubility measurements
MATERIAL TESTING↗
The tensile failure envelope of amorphous elastomers - effects of statistical variability and crosslink density.
Statistical variation of rupture stress and strain described by double exponental cumulative distribution of amorphous elastomers
STRAIN FIELD↗
Development of Vulcanizable Elastomers Suitable for Use in Contact with Liquid Oxygen Second Annual Summary Report, 9 May 1964 - 8 May 1965
Thermal properties of fluorine containing polymers for development of vulcanizable elastomers suitable for use in contact with liquid oxygen
POLYMER CHEMISTRY↗
Design and development of an elastomer seal for long term hazardous propellant storage
Design of elastomer seal for long term hazardous storage of nitrogen tetroxide
ELASTOMER↗
Fluids and elastomers for low-temperature heat transfer and hydraulic systems.
Fluids and elastomers for low temperature heat transfer and hydraulic systems
HEAT TRANSFER↗
Stress relaxation of gamma-irradiated fluorocarbon elastomers.
Stress relaxation of gamma irradiated fluorocarbon elastomers to study radiation induced chain scissions in copolmers
ELASTOMER↗
Studies on sterilizable elastomers
Quick curing sterilizable elastomer prepared from carboxyl terminated polybutadiene and imine curative
CURING↗
Ultimate tensile properties of elastomers. III - Dependence of the failure envelope on crosslink density
Ultimate tensile properties of amorphous unfilled elastomers - dependence of failure envelope on crosslink density
CROSS LINKING↗
Studies of sterilizable elastomers
Dynamic-mechanical properties of sterilizable polybutadiene elastomer after high temperature exposure
POLYBUTADIENE↗
The relation between stress and strain in multiaxial deformations of elastomers.
Elastomer elastic deformation response in multiaxial stress field shown identical to uniaxial stress response
ELASTIC DEFORMATION↗
Leak Rate Performance of Silicone Elastomer O-Rings Contaminated with JSC-1A Lunar Regolith Simulant
Contamination of spacecraft components with planetary and foreign object debris is a growing concern. Face seals separating the spacecraft cabin from the debris filled environment are particularly susceptible; if the seal becomes contaminated there is potential for decreased performance, mission failure, or catastrophe. In this study, silicone elastomer O-rings were contaminated with JSC- 1A lunar regolith and their leak rate performance was evaluated. The leak rate values of contaminated O-rings at four levels of seal compression were compared to those of as-received, uncontaminated, O-rings. The results showed a drastic increase in leak rate after contamination. JSC-1A contaminated O-rings lead to immeasurably high leak rate values for all levels of compression except complete closure. Additionally, a mechanical method of simulant removal was examined. In general, this method returned the leak rate to as-received values.
leak rate↗