Decomposition kinetics of manganese tris (carbohydrazide) perchlorate (MnCP) derived from the filament control voltage of the T-jump/FTIR spectroscopy

By using T-jump/FTIR spectroscopy, a "snapshot" simulation of the surface reaction zone is captured by a thin film of material heated rapidly to temperatures characteristic of the burning surface. Additionally, the Pt filament is highly sensitive to the heat changes and thermochemical reactions of the material, the time-to-exotherm (t_x) kinetics method derived from the control voltage trace of the Pt filament is introduced to determine kinetics of the exothermic decomposition reaction of energetic materials. It yields kinetic parameters of flash pyrolysis of manganese tris (carbohydrazide) perchlorate (MnCP) in the 343-388 °C range at 0.1 MPa Ar atmosphere: E_s = 87.05 kJ mol^-1, ln A_s = 15.03. Value of the activation energy determined herein is smaller than that of Kissinger and Ozawa-Doyle method, the T-jump/FTIR spectroscopy might be more representative of the surface of explosion reaction and enable the pyrolysis surface to be incorporated into models of steady and possibly unsteady combustion. The kinetics can also be profitably of great importance to the understanding of the behavior of energetic material in practical combustion problems. Performance study shows that MnCP warrants further in-depth trials for the adoption in detonators and chemically compatible primary explosives.