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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2018027732
pages 147-170

THERMAL STABILITY AND COMBUSTION BEHAVIORS OF ENERGETIC MATERIALS BASED ON A NEW HETEROCYCLE AZASYDNONE

Valery V. Serushkin
Department of Chemical Engineering, Mendeleev University of Chemical Technology, Moscow, 125047, Russia
Valery P. Sinditskii
Department of Chemical Engineering, Mendeleev University of Chemical Technology, Moscow, 125047, Russia
Sergey A. Filatov
Department of Chemical Engineering, Mendeleev University of Chemical Technology, Moscow, 125047, Russia
P. D. Kulagina
Mendeleev University of Chemical Technology, Moscow, 125047, Russia
V. T. Nguyen
Mendeleev University of Chemical Technology, Moscow, 125047, Russia
I. A. Vatsadze
N.D. Zelinsky Institute of Organic Chemistry, RAS, Moscow, Russia
I. L. Dalinger
N.D. Zelinsky Institute of Organic Chemistry, RAS, Moscow, Russia
A. B. Sheremetev
N.D. Zelinsky Institute of Organic Chemistry, RAS, Moscow, Russia

RÉSUMÉ

Derivatives of mesoionic heterocycle azasydnone (oxatriazolium-5-olate derivatives) may be of interest not only as medications, but also as energetic materials. In order to determine the possible applications of a new class of energetic compounds, it is necessary to determine the thermal stability, the combustion behaviors, and other properties of representatives of this chemical class. The thermal stability of the substances was studied by differential scanning calorimetry (DSC) method under non-isothermal conditions and by means of gas evolution method (in Burdon glass manometers) under isothermal conditions. Combustion behavior of pressed samples was investigated in a constant-pressure bomb in a wide pressure interval, and the flame structure was studied with the help of thin tungsten–rhenium thermocouples. Investigation of the thermal stability of the derivatives of azasydnones showed that the heterocycle possesses satisfactory stability. The decomposition of molecules begins with the decomposition of the azasydnone ring, and there is a strong dependence of the thermal stability of azasydones on the nature of the substituent. The heat effect of decomposition of the azasydnone ring consists of the enthalpy of formation (16–20 kcal mol-1) and the heat of oxidation of the carbon atom adjacent to the cycle. It is shown that the introduction of mesoionic heterocycle in nitropyrazoles leads to a decrease in the exponent in the combustion law. It turned out that the decomposition reaction with activation energy less than 30 kcal mol-1 controls the burning rate of these compounds.


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