RDX和HMX的热分解III.分解机理  

Thermal Decomposition of RDX and HMX Explosives Part III: Mechanism of Thermal Decomposition

作　　者：刘子如[1] 刘艳[2] 范夕萍[3] 赵凤起[1] 

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]北京防化研究院,北京102205 [3]北京理工大学,北京100081

出　　处：《火炸药学报》2006年第4期14-18,共5页Chinese Journal of Explosives & Propellants

摘　　要：简述RDX和HM X热分解的各种机理,其热分解的初始过程是N-N和C-N键断裂的竞争反应,试验条件和样品相态等因素影响竞争过程。用DSC-FT IR联用技术和热裂解原位池/FT IR分析了主要分解气相产物和凝聚相中主要官能团的变化。结果表明,RDX和HM X热分解的主要分解气相产物为N2O,CH2O,CO,CO2,H2O和HCN。RDX的分解气相产物CH2O和H2O红外吸收率的温度关系曲线都产生双峰,RDX基团-NNO2的吸收带1 589 cm-1和1 278 cm-1有两个不同速率的变化过程。用N-N键和C-N键竞争断裂的观点解释了RDX与HM X热分析和产物分析的结果。The thermal decomposition mechanism of RDX and HMX were in brief reviewed. The competing reactions of N--N and C--N bonds splitting occurred in initial stage of RDX and HMX decomposition are affected by the experimental conditions and sample phase state. The main gas products of decomposition were identified by DSC-FTIR coupling technique. The changes of the main function groups in condensed phase were measured by a in situ thermolysis cell/FTIR technique. The main gas products of RDX and HMX decomposition consist of N2O, CH2O, CO, CO2, H2O and HCN. The double peaks appear on the curves of temperature dependence of IR absorbance of CH2O and H2O for RDX. The two different rates of IR absorption intensities occur on temperature dependence of 1 589cm^-1and 1 278cm^-1bands attributed to-NNO2 for RDX. On the basis of view point for the competing reactions, the results of thermal analyses and product analyses for RDX and HMX decompositions are explained.

关 键 词：物理化学 RDX HMX 热分解 分解机理 DSC FTIR 

分 类 号：O621.25[理学—有机化学] TK16[理学—化学]