TATB的热分解及其在[Emim]Ac/DMSO溶剂中的热爆炸特性  

Thermal Decomposition of TATB and Its Thermal Explosion Characteristics in[Emim]Ac/DMSO Solvent

作　　者：曹雄[1] 罗帅[1] 许丽娟[1] 孟瑞鸿 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《火炸药学报》2016年第1期52-55,共4页Chinese Journal of Explosives & Propellants

基　　金：山西省自然科学基金资助(2010011016)

摘　　要：用DSC-TG研究了TATB的热分解过程。根据升温速率分别为5、10、15、20K/min的DSC和TG-DTG曲线计算了分解反应的活化能(E)、指前因子(A)和120℃时的速率常数(k120),并计算了升温速率为5K/min时,TATB分解峰值温度时的分解反应活化焓、活化熵和活化自由能,用小容量测试法研究了TATB在1-乙基-3-甲基咪唑醋酸盐/二甲基亚砜([Emim]Ac/DMSO)溶剂中的热爆炸特性。结果表明,采用Kissinger法和Ozawa法计算得到TATB分解反应的活化能分别为212.1和212.0kJ/mol,采用Rogers公式和Arrhenius公式计算得到A和k120值分别为5.87×1016s-1和3.87×10-12s-1;升温速率为5K/min条件下,TATB分解峰值温度时的分解反应活化焓、活化熵和活化自由能分别为206kJ/mol、61.42J/(K·mol)和167.39kJ/mol,TATB粉末的临界爆炸温度为336.6℃;TATB在[Emim]Ac/DMSO溶剂中不爆炸。The thermal decomposition process of TATB was studied by DSC-TG.The activation energy （E）, pre-exponential factor（A）,rate constant at 120℃（k120 ）were calculated based on the DSC and TG-DTG curves at heating rates of 5,10,15 and 20 K/min.The enthalpy of activation,entropy of activation and free energy of activation for TATB decomposition reaction at the temperature of decomposition peak at a heating rate of 5 K/min were calculated.The thermal explosion characteristics of TATB in 1-ethyl-3-methylimidazolium acetate/DMSO （[Emim]Ac/DMSO）solvent were studied by the small capacity test method.Results show that the values of E, calculated by Kissinger and Ozawa′s methods A and k120 of TATB decomposition reaction are 212.1 and 212.0kJ/mol,respectively.Aandk20 calculated by formulas of Rogers and Arrhenius are 5.87×1016s-1 and 3.87× 10-12 s-1 ,respectively.The enthalpy of activation,entropy of activation and free energy of activation for TATB decomposition reaction at the temperature of decomposition peak at a heating rate of 5 K/min are 206 kJ/mol, 61.42J/（K·mol）and 167.39kJ/mol,respectively.The critical explosion temperature of TATB powder is 336.6℃.TATB does not explode in the [EmimAc/DMSO]solvent.

关 键 词：物理化学 TATB 热分解 临界爆炸温度 动力学参数 热力学参数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O642[理学—物理化学]