为考察2，6-二氨基-3，5-二硝基吡啶-1-氧化物（ANPyO）的热稳定性，用绝热加速量热仪测定了 ANPyO 的绝热分解过程，获得了分解的温度、压力、升温速率等随时间的变化曲线以及温升速率、分解压力随温度的变化曲线。结果表明：绝热分解过程有两个放热反应阶段，其中第一阶段为主要的热分解阶段，温升速率有显著的变化。计算得表观活化能为293．61 kJ·mol-1、指前因子为1．515×1023 min-1，反应热为940．92 J·g-1。ANPyO初始分解温度高达290．8℃，有良好的热稳定性。%To explore the thermal stability of 2,6-diamino-3,5-dinitropyridine-1-oxide( ANPyO),the adiabatic decomposition process of ANPyO was studied by accelerating rate calorimeter. The decomposition temperature,pressure and temperature rise rate versus time curves,and pressure and temperature rise rate versus temperature curves were obtained. Results show that adiabatic thermal decomposition process of ANPyO can be divided into two exothermic reaction stages. The first stage is the main decompo-sition one,in that the temperature rise rate has an obvious change. The apparent activation energy,pre-exponential factor and heat of reaction obtained by calculation are 293. 61 kJ·mol-1,1. 515×1023 min-1 and 940. 92 J·g-1,respectively. The initial decomposition temperature of ANPyO is higher than 290. 8 ℃,showing a better thermal stability.
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