School of Environmental and Safety Engineering，North University of China， Taiyuan 030051， China
利用微热量热实验研究了黑索今（RDX）的热分解特性及奥克托今（HMX）对其热稳定性的影响，运用AKTS分析软件对热分解曲线进行解耦分峰，得到了不受熔融相变影响的热分解曲线和参数，采用Kissinger、Friedman和Ozawa法计算了其热分解活化能。结果表明：RDX是熔融分解型物质，解耦后的RDX熔融峰温为201.07~208.05 ℃，分解峰温为207.99~232.76 ℃，活化能为167.70 kJ·mol-1，通过Friedman法和Ozawa法计算的活化能变化趋势相同，并得到AKTS软件验证。不同RDX/HMX比例（9/1，8/2，7/3，6/4，5/5）的样品与单质RDX相比，混合样品中RDX的熔融峰温平均降低了8.63,8.32,9.70,8.57,6.50 ℃，其分解峰温平均改变了1.14,2.01,2.58,3.53,3.47 ℃；混合样品中RDX活化能为162.32,151.40,149.78,141.14,132.93 kJ·mol-1，表明随着HMX比例的增加，RDX活化能降低。
Thermo-decomposition performances of RDX and corresponding HMX-doping samples were studied comprehensively through microcalorimetric experiments. Thermo-decomposition curves and parameters without the influence of melting phase transition were simulated via decoupling peak separation method through AKTS software. The thermo-decomposition activation energies (Ea) of all the samples were calculated via Kissinger, Friedman and Ozawa methods, respectively. The results showed that RDX was belonging to melt decomposition materials. Its melting peak temperature was in the region of 201.07~208.05 ℃, while its decomposition peak temperature was in the range of 207.99~232.76 ℃. Its thermo-decomposition Ea value was 167.7 kJ·mol-1 calculated via Kissinger method which was consistent well with the values which calculated via Friedman and Ozawa methods, respectively. The Ea values were further confirmed by AKTS simulated result. On the other hand, the melting and decomposition peak temperatures of HMX-doping samples were decreased with the doping of HMX. The precise decreased values were 8.63, 8.32, 9.70, 8.57 ℃ and 6.50 ℃ for melting peak temperatures and 1.14, 2.01, 2.58, 3.53 ℃ and 3.47 ℃ for decomposition peak temperatures with the RDX:HMX ratios of 9∶1, 8∶2, 7∶3, 6∶4, 5∶5, respectively. Notably, the thermo-decomposition Ea values of HMX-doping samples were also decreased with the increase content of HMX. The corresponding Ea values are 149.78, 151.40, 149.78, 132.93 kJ·mol-1 and 132.93 kJ·mol-1, respectively.
许亚北,谭迎新,曹卫国,等. RDX热分解特性及HMX对其热稳定性的影响[J].含能材料,2020,28(2):157-163. DOI:10.11943/CJEM2019073.
XU Ya-bei, TAN Ying-xin, CAO Wei-guo, et al. Thermo-decomposition Performance of RDX and the Effect of HMX on Its Thermo-stability[J]. Chinese Journal of Energetic Materials, 2020, 28(2):157-163. DOI:10.11943/CJEM2019073.