Combustion Studies of 4‐Nitramino‐1,2,4‐Triazole (4‐NRTZ) and Its Salts: High Impulse Nitrogenous Fuels for Propellant Composite Materials

The nitrogenous salts of 4‐nitramino‐1,2,4‐triazole (4‐NRTZ, 2 ), namely ammonium‐4‐nitramino‐1,2,4‐triazolate (Amm‐4‐NRTZ, 3 ), hydrazinium‐4‐nitramino‐1,2,4‐triazolate (Hy‐4‐NRTZ, 4 ) and hydroxylammonium‐4‐nitramino‐1,2,4‐triazolate (HyAm‐4‐NRTZ, 5 ) were synthesized, characterized by spectroscopic (FTIR, FT‐Raman, NMR) methods and their structures were confirmed by single‐crystal X‐ray diffraction technique. The salts ( 3 ‐ 5 ) prepared in good yields showed good thermal stabilities and positive heat of formation. Ordered packing in lattice proved the better insensitivity of 3 & 5 towards IS, FS and ESD. Compounds 2 & 5 were further studied for its pressure generating capability inside a constant volume combustion chamber. Pressure‐time ( P ‐ t ) traces as well as d p /d t analysis revealed compound 5 has good gas generating capability. Theoretical predictions on the ballistic parameters in comparison with known compounds substantiate the potential of 5 as a strong candidate in propellant/gas generating composite materials.