期刊
ENERGETIC MATERIALS FRONTIERS
卷 4, 期 2, 页码 68-76出版社
KEAI PUBLISHING LTD
DOI: 10.1016/j.enmf.2023.06.002
关键词
Energetic materials; Nitrotriazolylformazan; Decarboxylative gem -diazo-coupling; Laser ignition combustion performance
In this study, new nitrogen-rich energetic salts were synthesized and characterized. The results showed that these compounds have high heats of formation, low impact sensitivity, and good combustion performance.
Formazans, containing the characteristic chain of atoms -NN-CRN-NH- (R = -CN or tetrazyl) are nitrogen-rich and conjugated compounds exhibiting unique properties. In this work, new cyano and tetrazylformazans and their series of nitrogen-rich energetic salts were synthesized via base-promoted gem-diazo coupling reaction. The resulting derivatives were well characterized, and their performances were further investigated. The experimental results indicated that the decomposition temperatures of 1-12 lie between 159 degrees C and 279 degrees C. All of them are much less impact sensitive (>= 20 J) than trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX). They have relatively high positive heats of formation between 987.7 and 1457.3 kJ mol(-1), which are much higher than those of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20), RDX and HMX. The calculated detonation pressures (p) range between 23.2 and 30.2 GPa and calculated detonation velocities (D) between 7480 and 8274 m s(-1). Interestingly, compound 4 shows excellent laser ignition combustion performance.
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