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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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Nonwoven glass fiber mat reinforces the adhesive properties of a polyurethane adhesive that fastens hardware to exterior surfaces of aluminum tanks. The mat is embedded in the uncured adhesive. It ensures good control of the bond line and increases the peel strength.
Silane coupling agents used as primers, and additives for polyurethane bonding
Bond line thickness, adherend etchant, and adherend primer effects on lap shear strength of polyurethane adhesive
Evaluation of gas chromatographic determination of trichlorofluoromethane in polyol component of polyurethane foam
Primer ensures effective bonding integrity of polyurethane adhesives on metal surfaces at temperatures ranging from minus 423 degrees to plus 120 degrees F. It provides greater metal surface protection and bond strengths over this temperature range than could be attained with other adhesive systems.
Fracture energy and mechanical properties of polyurethane elastomers
Nondestructive test device for evaluation of polyurethane foam sprayed insulation on Saturn S-2 stage
Low density polyurethane foam with and without honeycomb as ablative material for reentry vehicles, discussing oxidation resistance
Fluorinated polyurethanes synthesis for liquid oxygen environments and cryogenic structural utility, noting structural effects on LOX compatibility
Polyurethane foam composites for low heating rate thermal protection, noting astroquartz fiber additive effect on performance
Open-celled polyurethane foam has a density of 8.3 pounds per cubic foot and a compressive strength of 295 to 325 psi. It is useful as a porous spacer in layered insulation and as an insulation material in vacuum tight systems.
Polyurethane spray foam insulation system application methods for liquid hydrogen tanks
Linear compressibility assumption incorporated into third order multiple integral representation of nonlinear creep of polyurethane, reducing time independent kernel functions
Polyurethane adhesives differential thermal analysis, rebound resilience and tensile properties at cryogenic temperatures
Resilience and tensile properties of polyurethane adhesive at cryogenic temperatures measured by differential thermal analysis
New polyurethanes, formed from a reaction of a prepolymer diol and a perfluorinated diisocyanate, are nonflammable and possess high corrosion resistance and good low temperature flexibility. Polymer hardness increases rapidly with increasing ratio of diisocaynate to diol, but its glass transition temperature is not adversely affected.
Lightweight polyurethane foam assembled in panels is effective spacer material for construction of self-evacuating multilayer insulation panels for cryogenic liquid tanks. Spacer material separates radiation shields with barrier that minimizes conductive and convective heat transfer between shields.
Modification of polyurethanes with alkyl halide resins, inorganic salts, and encapsulated volatile and reactive halogen for fuel fire control