Synthesis and Characterization of a New Energetic Salt based on Dinitramide

Abstract

The development of new ionic salt as green propellants is one of intense investigations to replace toxic N, N′-dimethylhydrazine. A new energetic salt N, N′,N′′-tri(propan-2-ylidene)methanetriamium dinitramide (NTAGDN) based on dinitramide was synthesized by reacting silver dinitramide with triaminoguanidinium chloride. The structure of this new energetic salt was confirmed by single-crystal X-ray diffraction, elemental analysis, Fourier transform infrared spectrometry, ultraviolet-visible spectrophotometry, and nuclear magnetic resonance spectroscopy. NTAGDN crystallizes in the orthorhombic space group R3¯. Thermal decomposition was studied by differential scanning calorimetry, differential thermal analysis, and thermogravimetric tandem infrared spectrometry. Results indicated that NTAGDN exhibited excellent resistance to thermal decompositions of up to 470 K and incurred an 80.54 % mass loss between 450 and 523 K via exothermic decomposition. The kinetic parameters of NTAGDN thermal decomposition were also obtained from the differential thermal analysis data by Kissinger's method with Ea = 125.46 kJ·mol-1. Moreover, based on the Kamlet-Jacobs formula, the detonation velocity and detonation pressure of NTAGDN were calculated as 6.3 km·s-1 and 15 GPa, respectively.