Preparation, characterization and thermodecomposition behaviors of high-nitrogen energetic salts derived from polynitropyridone
CAI Mei-yu, ZHANG Guo-fang*, ZHOU Hai-bo, JING Ping, HE Chong
(Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; College of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
Based on the relatively stronger acidity of polynitropyridone(DNP), we designed and synthesized twelve novel high-nitrogen energetic salts in aqueous phase. The products were confirmed by melting point determinations, element analysis, 1H NMR, FT-IR, powder XRD analyses and X-ray single-crystal diffraction analyses. The single crystals data of NH4(4DNP) and (C2H5)2NH2(4DNP) indicated that the former belonged to a Triclinic, P1- space group and the latter to a monoclinic, C2/c space group. The thermal decomposition analyses studied by using DSC and TG-DTG techniques revealed that NH4(4DNP) experienced two endothermic processes with peak temperatures of 183℃ and 214℃ and one exothermal process with peak temperature of 278℃ and CN2H4NH2(4DNP) only one intense exothermal process with peak temperature of 319℃. The exothermic enthalpy changes for NH4(4DNP) and CN2H4NH2(4DNP) are -183.37 kJ/mol and -382.6 kJ/mol, respectively.
KeyWords:
high-nitrogen energetic salt; polynitropyridone; synthesis; crystal structure; thermodecom position behavior
