加速量热仪研究2,4,6-三氨基-3,5-二硝基吡啶-1-氧化物的热分解

Adiabatic Decomposition Properties of 2,4,6-Triamino-3,5-dinitropyridine-1-oxide by Accelerating Rate Calorimeter

为研究高能量密度材料2,4,6-三氨基-3,5-二硝基吡啶-1-氧化物(TANPyO)的热分解性能和热稳定性,利用绝热加速量热仪(ARC)测量其在绝热条件下的热分解过程,获得了热分解的温升速率、温度和压力等随时间的变化关系以及温升速率、压力随温度的变化曲线。结果表明:TANPyO绝热分解主要有两个放热过程,其中第二过程温升速率升降幅度较大,为主要的热分解过程。TANPyO初始分解温度高达252.7℃,具有良好的热稳定性。根据温升速率方程和Arrhenius公式计算出TANPyO表观活化能、指前因子和反应热分别为476.96kJ·mol-1、6.920×1042 min-1和930.84J·g-1。

In order to investigate thermal decomposition properties and thermal stability of high energy density energy materials 2,4,6-triamino-3,5-dinitropyridine-1-oxide（TANPyO）, the adiabatic decomposition process of TANPyO was studied by accelerating rate calorimeter（ARC）. Temperature rise rate, temperature and pressure versus time curves, pressure and temperature rise rate versus temperature curves were obtained, respectively. Results show that adiabatic decomposition process of TANPyO can be divided into two exothermic stages. The second stage is the main thermal decomposition process with a great change in temperature rise rate. The initial decomposition temperature of TANPyO is 252.7 ℃, which proves that TANPyO has good heat stability. Kinetic and thermodynamic parameters were calculated by temperature rise rate equation and Arrhenius equation are as follows： apparent activation energy 476.96 kJ·mol-1, pre-exponential factor 6.920×1042 min-1, reaction heat 930.84 J·g-1, respectively.