The fracture energy and some mechanical properties of a polyurethane elastomer
Fracture energy and mechanical properties of polyurethane elastomers
Knauss, W. G.↗
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Development of nondestructive test device for evaluation of 3/4-inch thick polyurethane Spray-On Foam Insulation /SOFI/ on the Saturn S-2 stage
Nondestructive test device for evaluation of polyurethane foam sprayed insulation on Saturn S-2 stage
Haralson, H. S.↗
Evaluation of a polyurethane foam for ablative protection at low heating rates.
Low density polyurethane foam with and without honeycomb as ablative material for reentry vehicles, discussing oxidation resistance
Parker, J. A.↗
Synthesis of fluorinated polyurethanes.
Fluorinated polyurethanes synthesis for liquid oxygen environments and cryogenic structural utility, noting structural effects on LOX compatibility
Gosnell, R.↗
Experimental Evaluation of Polyurethane Foam Composites for Low-Heating-Rate Thermal Protection.
Polyurethane foam composites for low heating rate thermal protection, noting astroquartz fiber additive effect on performance
Parker, J. A.↗
Open-celled polyurethane foam
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.
Russell, L. W.↗
Development of methods for application of polyurethane spray foam insulation systems to liquid hydrogen tanks
Polyurethane spray foam insulation system application methods for liquid hydrogen tanks
Carter, J. M.↗
A linear compressibility assumption for the multiple integral representation of nonlinear creep of polyurethane
Linear compressibility assumption incorporated into third order multiple integral representation of nonlinear creep of polyurethane, reducing time independent kernel functions
Findley, W. N.↗
Cryogenic properties of a polyurethane adhesive
Polyurethane adhesives differential thermal analysis, rebound resilience and tensile properties at cryogenic temperatures
Robbins, R. F.↗
Cryogenic properties of a polyurethane adhesive
Resilience and tensile properties of polyurethane adhesive at cryogenic temperatures measured by differential thermal analysis
Robbins, R. F.↗
Preparation of highly fluorinated polyurethanes
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.
Rochow, S. E.↗
Rigid open-cell polyurethane foam for cryogenic insulation
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.
Faddoul, J. R.↗
Modified polyurethane foams for fuel-fire Patent
Modification of polyurethanes with alkyl halide resins, inorganic salts, and encapsulated volatile and reactive halogen for fuel fire control
Parker, J. A.↗
The fracture energy and some mechanical properties of a polyurethane elastomer.
The energy required to form a unit of new surface in the fracture of a polyurethane elastomer is determined. The rate sensitivity of the material has been reduced by swelling it in toluene. This paper primarily describes the experimental work of measuring the lower limit of the fracture energy. With this value and the creep compliance as a basis, the rate dependence of fracture energy for the unswollen material has been determined. It is thus shown that the dependence of the fracture energy on the rate of crack propagation can be explained by energy dissipation around the tip of the crack. Good agreement between the theoretically and experimentally determined relationships for the rate-sensitive fracture energy is demonstrated.
Mueller, H. K.↗
Polyurethanes of fluorine containing polycarbonates
The polyurethane polymer prepared by reacting a hydroxy-terminated carbonate with an organic diisocyanate is examined.
Trischler, F. D.↗
Polyurethanes from fluoroalkyl propyleneglycol polyethers
A description is given of highly stable polyurethane polymers prepared by reacting a polyether with a diisocyanate. Compounded stocks of these polymers may be shaped and cured in conventional equipment used in the rubber industry. The solutions are dispersed gels prepared from the polymers and may be used for forming supported or unsupported films for coating fabrics or solid surfaces, and for forming adhesive bonds between a wide variety of plastics, elastomers, fabrics, metals, wood, leather, ceramics and the like.
Trischler, F. D.↗
Fluorine containing polyurethane
A polyurethane polymer prepared by reacting a hydroxy-terminated polyformal with an organic diisocyanate is presented.
Trischler, F. D.↗
Highly fluorinated polyurethanes
The reaction perfluorinated hydroxyl terminated polyether with diisocyanate to form polyurethane is discussed. Data are given on the resin's oxidation stability, chemical resistance, and low temperature flexibility.
Stump, E. C., Jr.↗