Synthesis And Performance Studies Of High Nitrogen Less Hydrogen Compounds

Nitrogen rich compound is a nitrogen heterocyclic compound,whose nitrogen content is more than 20%,which has a series of good properties,such as high density,high positive heat of formation,good thermal stability and so on.In this work,three kinds of nitrogen rich compounds,azotriazole,lead azotetrazolate（PbATZ）and2-nitro-4,5-dicyanomidazole（NDCI）,are studied on synthesis method,structure characterization,thermal behavior and explosive property.The achievements are as followings.（1）3,3-azotetrazole was prepared from 3-amino-1,2,4-triazole.The structure of3,3’-azotetrazole was characterized via FT/IR,HNMR and CNMR.Besides,TG-DSC was used to make the thermal analysis.The kinetics parameters,activation energy and pre-exponential factor,were calculated by Kissinger method and Ozawa method.Finally,the impact sensitivity and friction sensitivity were tested.（2）Firstly,5-aminotetrazole was prepared from NaN₃.PbATZ was prepared from sodium 5-aminotetrazolate.The structure of PbATZ was characterized via elemental analysis and X-ray single crystal diffraction.PbATZ can be a sort of additive which is able to decrease the decomposition temperature of KNO₃,（3）2-amino-4,5-dicynomidazole was used to prepare NDCI.The structure was characterized via elemental analysis,FT/IR and NMR.The thermal behavior of NDCI was studied by TG-DSC.The kinetics parameters,activation energy and pre-exponential factor,were calculated by Kissinger method.Besides,the explosive products were studies to gain the decomposition process of NDCI.By testing the heat of combustion,the heat of formation of NDCI can be obtained.The explosive velocity,explosive pressure and density of 2-nitro-4,5-dicynomidazolate salts were calculated.Finally,the impact sensitivity and friction sensitivity were tested.