4,4＇-偶氮-1H-1,2,4-三唑-5-酮铵盐AZTO·H_(2)O的制备及热化学性质

Preparation and Thermal Properties of 4,4-Azo-1H-1,2,4-triazol-5-one Ammonium Salt

以4-氨基-1,2,4-三唑-5-酮（ATO）为原料,通过高锰酸钾氧化制备了一种新型高能有机铵盐4,4＇-偶氮-1H-1,2,4-三唑-5-酮铵盐（AZTO·H2O）。用差示扫描量热法研究了其的热行为。用Kissinger法和Ozaw a法计算了其非等温热分解反应的动力学参数。结果表明,其分解热、表观活化能和指前因子分别为247.46 k J·mol^-1、177.80 k J·mol-1和1015.74s^-1。其热爆炸临界温度和298.15 K下的摩尔热容分别为233.1℃和271.45 J·mol^-1·K^-1。它的绝热至爆炸时间为72.8-74.7 s。描述AZTO·H2O放热分解反应的动力学方程为：dα/d T=10^15.74/β×4（1-α）[-ln（1-α）]^3/4 exp（-1.774×10^5/RT）。

A new high-energy organic ammonium salt4,4＇-azo-1H-1,2,4-triazol-5-one ammonium salt（AZTO · H2O） was synthesized via potassium permanganate oxidation using 4-amino-1,2,4-triazol-5-one（ATO） as starting material.The thermal behaviors of AZTO · H2O was studied by differential scanning calorimetry.The kinetic parameters of non-isothermal exothermic decomposition reaction were calculated by Kissinger method and Ozawa method.Results show that the decomposition heat,apparent activation energy and pre-exponential factor of AZTO · H2O are 247.46 kJ · mol^-1,177.80 kJ · mol^-1 and 10^15.74s^-1 respectively.The critical temperature of thermal explosion and molar heat capacity at 298.15 K for AZTO · H2O is 233.10 ℃ and 271.45 J · mol^-1 · K^-1,respectively.The adiabatic time-to-explosion is between 72.8 s and 74.7 s.The kinetic equation describing the exothermic decomposition reaction of AZTO · H2O is dα/dT=10-（15.74）/β×4（1-α）[-ln（l-α）]^（3/4）exp（-1.774×10^5 /RT）.