摘要
为研究钝感熔铸炸药2,4,6-三硝基-3-溴苯甲醚(TNBA)的热分解特性及其机理,采用一步硝化法制备了TNBA,并采用TG-MS、DSC及TG等方法对其热分解过程、热分解的热力学和动力学参数以及热分解机理进行了研究。结果表明:TNBA的热分解产物为CO(N_(2))、H_(2)、H_(2)O以及少量的C、CH_(4)、CO_(2);热分解反应速率常数(k)为0.31 s^(-1)、活化焓(ΔH≠)为61.83 kJ∙mol^(-1)、活化能(Ek)为66.31 kJ∙mol^(-1)、活化吉布斯自由能(ΔG≠)为139.72 kJ∙mol^(-1)、活化熵(ΔS≠)为-144.70 J∙mol^(-1)∙K^(-1);热分解动力学模型函数为Ginstling-Brounshtein(G-B)方程,热分解机理为圆柱形对称的三维扩散,动力学方程为■。
In order to study the thermal decomposition characteristics and mechanism of insensitive melt cast explosives 2,4,6-trinitro-3-bromoanisole(TNBA),TNBA was prepared by one-step nitration method.And the thermal decomposition process,thermodynamic and kinetic parameters and thermal decomposition mechanism of TNBA were studied by TG-MS,DSC and TG.The results show the decomposition products of TNBA are CO(N_(2)),H_(2),H_(2)O and a small amount of C,CH_(4),CO_(2);The thermal decomposition reaction rate constant(k)is 0.31s^(-1),the activation enthalpy(ΔH≠)is 61.83 kJ∙mol^(-1),the activation energy(EK)is 66.31 kJ∙mol^(-1),the activated Gibbs free energy(ΔG≠)is 139.72 kJ∙mol^(-1),the activation entropy(ΔS≠)is^(-1)44.70J∙mol^(-1)∙K^(-1).The thermal decomposition kinetic model function is G-B equation,the thermal decomposition mechanism is 3-dimensional diffusion with cylindrical symmetry,and the kinetic equation is ■.
作者
于志宏
饶文军
宋小兰
寇勇
王毅
安崇伟
YU Zhi-hong;RAO Wen-jun;SONG Xiao-lan;KOU Yong;WANG Yi;AN Chong-wei(School of Environment and Safety Engineering,North University of China,Taiyuan,030051;Jiangxi Xinyu Guoke Technology Co.Ltd.,Xinyu,338034;School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing,210094;School of Materials Science and Engineering,North University of China,Taiyuan,030051)
出处
《火工品》
CAS
CSCD
北大核心
2022年第6期65-69,共5页
Initiators & Pyrotechnics
基金
武器装备预研基金(No.6140656020201)。
关键词
炸药
TNBA
热分解动力学
模型拟合法
热分解机理
Explosive
TNBA
Thermal decomposition kinetics
Model fitting method
Thermal decomposition mechanism
