摘要
采用TG-DSC-QMS-FTIR同步动力学技术对RDX的热分解过程进行了研究,结果表明,RDX在熔融之后发生分解,可以确定RDX的产物有C、H2O、CH2O、N2O、CO、CO2、NO2,可能有CH4和NH3,而几乎没有NO。采用多元非线性拟合技术进行动力学参数计算,结果表明,RDX的分解过程大致可以分为3个连续步骤,第1步反应的活化能为235kJ/mol,指前因子log(A/s-1)为22,反应级数为0.6,主要气体产物为CO2、NO2和CH2O;第2步反应的活化能为110kJ/mol,指前因子log(A/s-1)为1.5,反应级数为1.7,主要的气体产物是N2O、H2O、CH4、NH3、C2O+/C3H+4、CN+/C2H3+、CHO+/C2H+;第3步反应的活化能为223kJ/mol,指前因子log(A/s-1)为20.9,反应级数为4,主要的产物是C和CO。
The thermal decomposition process of RDX was investigated by TG-DSC-QMS-FTIR techniques. The result shows that RDX begins to decompose after melting. It is certain that the products have C、H2O、CH2O、N2O、CO、CO2、NO2 and NO2, maybe have CH4 and NH3, and have no NO. The kinetic parameters were calculated by nonlinear regression. The results show that the decomposition process of RDX can be divided into three successive steps. The first step： activation energy 235kJ/mol, the pre-exponential factor log（A/s^-1） 22, reaction order 0.64, the main products are CO2,NO2 and CH2O. The second step： activation energy 110kJ/mol, the preexponential factor log（A/s^1） 1.5, reaction order 1.7, the main products are N2O、H2O、CH4、NH3、C2O^＋/C3H4^＋、CN^＋/C2H3^＋ and CHO^＋/C2H^＋. The third step： activation energy 223kJ/mol, the pre-exponential factor log （A/ s^-1） 20.9, reaction order 4, the main products are C and CO.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2009年第1期32-35,共4页
Chinese Journal of Explosives & Propellants
