Combustion and Thermal Decomposition of Solid Gas-Generating Compositions Based on High-Enthalpy Polynuclear N-Heterocyclic Compounds and Poly-2-Methyl-5-Vinyltetrazole
N. N. Volkova1, D. V. Dashko2, A. F. Zholudev1, A. I. Kazakov1, M. B. Kislov1, A. V. Nabatova1, L. S. Yanovskii1,3
1Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Russia
2Tekhnolog Special Design and Technological Bureau, St. Petersburg, 192076 Russia
3Moscow Aviation Institute, Moscow, 125993 Russia
Keywords: burning rate synergism, heat-release kinetics, heat-release macrostages, energetic condensed systems, furazans, furoxans, azepines, poly-2-methyl-5-vinyltetrazole
Abstract
The macrokinetic laws of combustion and the kinetics of thermal decomposition of energetic condensed compositions containing high-enthalpy polynitrogen compounds based on the system of furazan, furoxan, and azepine rings and poly-2-methyl-5-vinyltetrazole as an active binder. The linear rates of high-temperature transformations (combustion) of compositions with different ratios of components were determined in the nitrogen pressure range 1 ÷ 6 MPa. It was found that the burning rate of compositions of polycyclic compounds and poly-2-methyl-5-vinyltetrazole exceeds the burning rate of individual components, with the synergistic effect increasing with decreasing nitrogen pressure in the system. Kinetic studies of heat release during thermal decomposition of energetic compositions in the temperature range 50 ÷ 350 °С under isothermal and nonisothermal conditions have shown that in pressed compositions, reactants interact, leading to a significant increase in the rate thermal decomposition of the mixture relative to the rate of decomposition of individual components. The data obtained indicate that one of the reasons for an increase in the burning rate upon mixing of components may be a change in the leading combustion reactions as a result of the chemical interaction of components of the binary composition.
|
