Results 101 to 110 of about 11,287 (255)
Stable polyurethane coatings for electronic circuits. NASA tech briefs, fall 1982, volume 7, no. 1 [PDF]
One of the most severe deficiencies of polyurethanes as engineering materials for electrical applications has been their sensitivity to combined humidity and temperature environments. Gross failure by reversion of urethane connector potting materials has
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Study of the Amplitude of Pressure and Thrust Oscillations in a Lab-Scale Hybrid Rocket [PDF]
, 2000 Hybrid rockets are being studied as a potential replacement for the solid rocket boosters on the NASA space shuttle. One physical characteristic of hybrid rockets that must be understood and overcome is potentially severe pressure oscillations during ...
Alford, Brian +4 more
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Investigating Premature Ignition of Thruster Pressure Cartridges by Vibration-Induced Electrostatic Discharge [PDF]
, 2010 Pyrotechnic thruster pressure cartridges (TPCs) are used for aeroshell separation on a new NASA crew launch vehicle. Nondestructive evaluation (NDE) during TPC acceptance testing indicated that internal assemblies moved during shock and vibration testing
Saulsberry, Regor, Woods, Stephen S.
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Preparing oxidizer coated metal fuel particles [PDF]
, 1974 A solid propellant composition of improved efficiency is described which includes an oxidizer containing ammonium perchlorate, and a powered metal fuel, preferably aluminum or beryllium, in the form of a composite.
Shafer, J. I., Simmons, G. M.
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, 2014 International audienceEfficient preparation of cyclobutenyl end-functionalized polyester macromonomers bearing polylactide (PLA) or poly(ε-caprolactone) (PCL) arms was achieved by organocatalyzed ring-opening polymerization (ROP) of L-lactide or ε ...
Fontaine, Laurent +5 more
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Kinetic Study and Thermal Decomposition Behavior of Magnesium-Sodium Nitrate Based on Hydroxyl-Terminated Polybutadiene [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2018 This paper has been utilizing the simultaneous ThermoGravimetric analysis and Differential Scanning Calorimetry (TG–DSC) to investigate the thermal decomposition of magnesium-sodium nitrate pyrotechnic composition based HTPB resin.
Hadi Abusaidi +2 more
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Lipid-absorbing Polymers [PDF]
The removal of bile acids and cholesterol by polymeric absorption is discussed in terms of micelle-polymer interaction. The results obtained with a polymer composed of 75 parts PEO and 25 parts PB plus curing ingredients show an absorption of 305 to 309%,
Marsh, H. E., Jr., Wallace, C. J.
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Thermally exfoliated graphite oxide [PDF]
, 2011 A modified graphite oxide material contains a thermally exfoliated graphite oxide with a surface area of from about 300 sq m/g to 2600 sq m/g, wherein the thermally exfoliated graphite oxide displays no signature of the original graphite and/or graphite ...
Abdala, Ahmed +2 more
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Rheology of suspensions with aluminum nano-particles [PDF]
, 2009 Nano-scale aluminum particles are innovative materials increasingly used in energetic formulations. In this contribution, the rheological behavior of suspensions with either paraffin oil or HTPB as the matrix fluid and nano-scale aluminum (ALEX) as the ...
Ulrich Förter-Barth, Ulrich Teipel
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AIP AdvancesThe Hydroxyl-Terminated Polybutadiene (HTPB) liner in solid rocket motors is a viscoelastic material formed through the polymerization and gelation of HTPB and toluene diisocyanate.
Dawei Wang, Yuxin Xie, Xinyi Gao
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