Thermal Research on the Decomposition Behaviors and Interactional Mechanism of NC–NG With DNTF

The thermal decomposition analysis of nitrocellulose–nitroglycerine (NC–NG), 3,4-dinitrofurazanfuroxan (DNTF), and their mixed system with differential scanning calorimetry (DSC), thermogravimetric analysis-DSC–mass spectroscopy–Fourier transform infrared spectroscopy (TG–DSC–MS–FTIR) coupling technique, and in situ FTIR experiments under different experimental conditions was carried out for the investigation of interaction mechanism between NC–NG and DNTF. The results demonstrated that the NC–NG mixture significantly decreased the decomposition peak temperature of DNTF, and the activation energy of final mixed system (156.32 kJ mol⁻¹) was lower than both NC–NG (163.82 kJ mol⁻¹) and DNTF (177.03 kJ mol⁻¹). On the basis of the gas fragmental products and condensed phase changes, NC–NG triggered the thermally decomposition process, resulting intensive amount of nitrogen oxides which further caused the breakage of nitro groups in DNTF.