Divalent nitrogen-rich cationic salts with great gas production capacities  

作　　者：Hao Gu Cheng-chuang Li Chang-hao Dai Dong-xu Chen Hong-wei Yang Guang-bin Cheng 

机构地区：[1]School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Xiaolingwei 200,Nanjing,210094,PR China

出　　处：《Defence Technology（防务技术）》2023年第4期54-68,共15页Defence Technology

基　　金：supported by the National Natural Science Foundation of China(No.21875110,22075143);the Science Challenge Project(No.TZ2018004);the Qing Lan Project for the grant。

摘　　要：Monocyclic nitrogen-rich 3-(aminomethyl)-4,5-diamine-1,2,4-triazole(1)and fused cyclic 3,7-diamine-6-(aminomethyl)-[1,2,4]triazolo[4,3-b][1,2,4]triazole(9)were synthesized through the convenient cyclization reaction from the readily available reactant.Their energetic salts with high nitrogen content were proved to be rare examples of divalent monocyclic/fused cyclic cationic salts according to the single crystal analyses.The structure of intermediate B was also identified and verified by its trivalent cation crystal 17.5H_2O indirectly.Energetic compounds 2-8 and 10-17 were fully characterized by NMR spectroscopy,infrared spectroscopy,differential scanning calorimetry,elemental analysis.These energetic salts exhibit good thermal stability with decomposition temperatures ranged from 182℃to 245℃.The sensitivity of compounds 2,6,10 and 14 is similar or superior to that of RDX while the others were much more insensitive to mechanical stimulate.Furthermore,detonation velocity of 10(8843 m/s)surpass that of RDX(D=8795 m/s).Considering the high gas production volume(≥808 L/kg)of 2,4,10and 12,constant-volume combustion experiments were conduct to evaluate their gas production capacities specifically.These compounds possess much higher maximum gas-production pressures(P_(max):7.88-10.08 MPa)than the commonly used reagent guanidine nitrate(GN:P_(max)=4.20 MPa),which indicate their strong gas production capacity.

关 键 词：Fused cyclic compound TRIAZOLE Divalent cation Gas production Energetic materials 

分 类 号：TQ560.1[化学工程—炸药化工]