Facile synthesis of three kinds triazole salts of 2,4,5-trinitroimidazole and their thermal decomposition properties

Abstract

ABSTRACT In this paper, 1,2,4-triazolium 2,4,5-trinitroimidazolate (2), 3-amino-1,2,4-triazolium 2,4,5-trinitroimidazolate (3) and 4-amino-1,2,4-triazolium 2,4,5-trinitroimidazolate (4) were synthesized based on the method of acid-base neutralization and precipitation, which is a simple method compared with the method in Gao’s literature. These compounds were characterized by FT-IR, NMR, elemental analysis. The structure of (2) was further confirmed by single-crystal X-ray diffraction. Thermal decomposition performances of (2)-(4) were tested using differential scanning calorimetry (DSC) and accelerating rate calorimeter (ARC). The DSC curves of (2)-(4) show that they all have good thermal stability and the order of thermal stability is (4) > (2) > (3). ARC test data calculation results show that the thermal stability of (2)-(4) is (3) > (2) > (4). The test results show that the thermal stability of compounds (2)-(4) under non-adiabatic and adiabatic conditions was quite different. The storage temperature of (2), (3) and (4) does not exceed 420.93 K, 435.78 K, and 393.69 K, respectively, and they will not undergo self-accelerating decomposition.