Unique zwitterionic explosophore azasydnonimine: thermal stability, decomposition and combustion mechanism of aromatic derivatives

A study of the thermal stability of derivatives of one of the most energetic heterocycle, azasydnonimine, was carried out. It has been shown that the azasydnonimine cycle has satisfactory stability which grows with an increase in the electronegativity of the substituent at the imine group. The combu...

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Published in:Journal of thermal analysis and calorimetry 2022-11, Vol.147 (22), p.12871-12881
Main Authors: Sinditskii, Valery P., Serushkin, Valery V., Yudin, Nikolay V., Melnikova, Ludmila Ya, Serushkina, Olga V., Lipilin, Dmitry L., Shkineva, Tatyana K., Dalinger, Igor L.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Autocatalysis
Burning rate
Chemistry
Chemistry and Materials Science
Combustion
Decomposition
Electronegativity
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
Surface active agents
Temperature distribution
Thermal stability
Thermocouples
Vapor phases
Zwitterions
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Summary:A study of the thermal stability of derivatives of one of the most energetic heterocycle, azasydnonimine, was carried out. It has been shown that the azasydnonimine cycle has satisfactory stability which grows with an increase in the electronegativity of the substituent at the imine group. The combustion behaviors of azasydnonimine derivatives have been investigated, and the temperature distribution in their combustion waves has been measured using thin thermocouples. Based on the obtained dependences of the surface temperature and burning rate on pressure, it was found that the burning rate of 3-phenyl-1,2,3,4-oxatriazolium-5-phenylamide (ASI-1) is determined by the fast kinetics of autocatalysis of decomposition in the melt at the temperature of burning surface. In the case of 3-(3-nitrophenyl-1,2,3,4-oxatriazolium-5-(2,4,6-trinitrophenyl)aminid (ASI-2), a peculiar Merzhanov-Dubovitsky combustion mechanism is realized, according to which a part of the heat is released in the aerosol droplets, and the rest of the heat required for the propagation of combustion comes from the gas phase.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-022-11503-4