摘要
在线性升温速率2.0、5.0、10.0和20.0K/min的条件下,采用热重-差热分析法(TG-DTA)测试5,5′-联四唑-1,1′-二氧二羟胺(TKX-50)的热分解行为,用Dzawa法和Kissinger法研究了其热分解动力学参数。结果表明,TKX-50的热分解过程可分为两个阶段,第一分解阶段活化能为147.05kJ/mol,指前因子为1012.91s-1,受二维扩散机理控制,反应机理服从n=1/2的Jander方程,热分解反应的动力学方程可表示为:dα/dT=1012.91/β×4(1-α)1/2[1-(1-α)1/2]1/2e14705/RT。
The thermal decomposition behavior of dihydroxylammonium-5,5′-bistetrazole-1,1′-diolate (TKX-50 ) was studied by TG-DTA at heating rates of 2.0,5.0,10.0 and 20.0 K/min and its thermal decomposition kinetic pa-rameters were studied by Ozawa′s and Kissinger′s methods.Results show that the thermal decomposition process of TKX-50 can be divided into two stages.The activation energy and pre-exponential factor for the first stage are 147. 05 kJ/mol and 10 12 .91 s-1 ,respectively.Thermal decomposition of the first stage is controlled by the mechanism of 2D diffusion,and the reaction mechanism obeys the Jander equation with n=1/2.The kinetic equation for the first decomposition stage can be expressed as:dαdT =10 12 .91β ×4(1-α) 1 2 1-(1-α) [ ] 1 2 1 2 e 14705 RT .
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2015年第2期42-45,共4页
Chinese Journal of Explosives & Propellants
基金
北方化学工业集团青年创新基金项目(20140941041)
关键词
物理化学
5
5′-联四唑-1
1′-二氧二羟胺
热分解
非等温反应动力学
physical chemistry
dihydroxylammonium-5,5′-bistetrazole-1,1′-diolate
thermal decomposition
non-isothermal reaction kinetics
