RDX-CMDB推进剂的催化热分解Ⅱ. 分解气体产物和催化作用机理  

Catalytic Decomposition of RDX-CMDB PropellantsⅡ. Gaseous Products of Decomposition and Catalytic Mechanism

作　　者：谢明召[1] 衡淑云[1] 刘子如[1] 王晗[1] 王晓红[1] 赵凤起[1] 

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《含能材料》2008年第6期716-720,共5页Chinese Journal of Energetic Materials

摘　　要：用热重-差示扫描量热-傅立叶转换红外-质谱(TG-DSC-FTIR-MS)联用技术研究了RDX-CMDB推进剂在所选用燃速催化剂(没食子高铅、对氨基苯甲酸铜和炭黑)作用下的热分解。对添加催化剂(纳米和普通)和不添加催化剂的RDX-CMDB推进剂热分解主要气体产物变化进行了分析,讨论了燃速催化剂对热分解特征量的影响,初步探索了催化剂的作用机理。结果表明,所研究的燃速催化剂能改变推进剂中RDX的初期热分解机理,使放热的C—N键断裂在与吸热的N—NO2键断裂的竞争反应中占优,放热量增大;也使双基组分放出有负生成热的CH2O的相对量增加;纳米铝盐-铜盐-炭黑三元复配催化效果最好。Thermal decomposition of RDX-CMDB propellants with burning rate catalysts （lead-gallate,Cu（Ⅱ）-p-aminobenzoic acid and carbon black） was investigated by using TG-DSC-FTIR-MS simultaneous techniques. On the basis of changes in main gaseous products,the effect of the catalysts with various components on the characteristic values for TG-DTG and DSC was discussed. Results show that the burning rate catalysts change the initial thermal decomposition mechanism of RDX. The C--N bond split which is in exothermic process has a predominance over competing branch reaction N--NO2 bond split which is in endothermie process. The relative quantity of CH20 （ with negative heat of formation △H_1^0） produced from the decomposition of NC/NG component increases. The burning rate catalysts can make decomposition heats of the propellants increase and thus the burning rate rise. The compositions composed of nano-sized lead salt-copper salt-carbon black have the best catalytic effect on RDX-CMDB, and make the most obvious changes of the characteristic values and make the biggest enhancement of burning rate.

关 键 词：物理化学 热重-差示扫描量热-傅立叶转换红外-质谱(TG-DSC-FTIR-MS) 热分解 燃速 RDX-CMDB 纳米燃速催化剂 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]