Results 161 to 170 of about 873 (194)
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Comparative DFT Study of Crystalline Ammonium Perchlorate and Ammonium Dinitramide
The Journal of Physical Chemistry A, 2008The electronic structure, vibrational properties, absorption spectra, and thermodynamic properties of crystalline ammonium perchlorate (AP) and ammonium dinitramide (ADN) have been comparatively studied using density functional theory in the local density approximation.
Weihua, Zhu +3 more
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Thermal Analysis of Ammonium Dinitramide Decomposition
Propellants, Explosives, Pyrotechnics, 1997AbstractThe new energetic material ammonium dinitramide (ADN), NH4N(NO2)2, has been investigated with regard to its thermal properties and decomposition behavior. Thermal decomposition of ADN is observed after complete melting at 91.5 °C. The main decomposition pathway is based on the formation of NH4NO3 and N2O followed by the thermal decomposition of
Stefan Löbbecke +2 more
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Energetics of ammonium dinitramide decomposition steps
Journal of Molecular Structure: THEOCHEM, 1998Abstract The structures, energies at 0 K and enthalpies at 298 K have been computed for 37 molecules, ions and transition states that have been implicated in the thermal decomposition of ammonium dinitramide. A density functional procedure was used: DF/B3P86/6–31 + G ∗∗.
Peter Politzer +2 more
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Combustion of ammonium dinitramide/polycaprolactone propellants
Proceedings of the Combustion Institute, 2002This paper is devoted to the investigation of characteristics and mechanisms of combustion of a compositesolid rocket pseudo-propellant of stoichiometric composition based on ammonium dinitramide (ADN) and polycaprolactone (PCL). Experimental data on the dependence of burning rate on pressure in the pressure range of 4–8 MPa for the ADN/PCL propellant ...
O.P. Korobeinichev +3 more
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Ammonium Dinitramide−Water: Interaction and Properties
Journal of Chemical & Engineering Data, 2006The interaction between ammonium dinitramide (ADN) and water was experimentally investigated by determining the solid−liquid phase diagram for the system ADN−water and by measuring its critical relative humidity at 25 °C. Additionally, the density of aqueous ADN solutions of different compositions were measured in the temperature range from (5 to 85 ...
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Separation of Ammonium Dinitramide from Reaction Mixture
Propellants, Explosives, Pyrotechnics, 1999To separate ammonium dinitramide from the reaction mixture obtained in the reaction between NO2HS2O7 and nitramine in aceto-nitrile and subsequent neutralization with NH3 aqua the following procedure was applied: – separation of the solid precipitated during the reactions; – evaporation of the acetonitrile solution; – extraction of the ...
Monika Malesa +2 more
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Review of Ammonium Dinitramide Toxicity Studies
2011Abstract : Ammonium dinitramide (ADN) is a class 1.1 explosive oxidizer being considered for use in solid rocket propellant mixtures. Studies performed evaluating the toxicity of ADN have included an acute and subacute toxicity screen, a 90-day reproductive screen and three follow-on reproductive studies, electron paramagnetic resonance (EPR ...
Teresa R. Sterner, David R. Mattie
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Crystallization of Spherical Ammonium Dinitramide (ADN) Particles
Propellants, Explosives, Pyrotechnics, 2000The described process aims to produce spherical ammonium dinitramide (ADN) particles of different sizes with a narrow particle size distribution. The crystallization process presented in this paper consists of two stages. In the first stage, molten ADN is dispersed in a continuous phase in which ADN is insoluble.
Ulrich Teipel +2 more
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Thermal behavior of new oxidizer ammonium dinitramide
Journal of Thermal Analysis and Calorimetry, 2012Ammonium dinitramide (ADN) is a promising new oxidizer for solid propellants because of its high oxygen balance and high energy content, and halogen-free combustion products. One of the characteristics needed for solid propellants is stability. Heat, light, and moisture are factors affecting stability during storage, manufacture, and use. For practical
Hiroki Matsunaga +2 more
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Research on optimizing the synthesis of ammonium dinitramide
Journal of Military Science and Technology, 2022Ammonium dinitramide (ADN) is one of the potential oxidants in solid propellant formulations because it is environmentally friendly, has a high specific impulse, and has minimum signature exhaust gases. ADN was synthesized through the nitration reaction of potassium sulfamate salt with a mixture of sulfuric acid and nitric acid.
Quang Hieu Pham +3 more
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