Azo compounds are widely involved in the industrial processes of dyes, pigments, initiators, and blowing agents. Unfortunately, these compounds have a bivalent unstable –NN– composition, which can be readily broken when the ambient temperature is elevated. Self-accelerating decomposition might cause a runaway reaction and lead to a fire, explosion, or leakage when the cooling system fails or other events occur. This study investigated the explosion properties, thermal stability parameters, and thermal hazard and mechanism of 2,2′–azobisisobutyronitrile (AIBN) and 2,2′–azobis–2–methylbutyronitrile (AMBN). We used a 20-L apparatus, vent sizing package 2, synchronous thermal analysis, and differential scanning calorimetry under explosive, adiabatic, and dynamic conditions to acquire the explosive curves, thermal curves, and thermodynamic parameters of the substances. Moreover, the differential isoconversional method (Friedman method) and ASTM E698 equation were employed to obtain the apparent activation energy E_a. All the experimental results revealed that AIBN is more dangerous than AMBN. The E_a of AIBN was lower than that of AMBN. The results can be used to construct an azo compound thermal hazard database for use for searches and reference examples by industry and related research areas.

偶氮化合物广泛参与染料、颜料、引发剂和发泡剂的工业过程。不幸的是，这些化合物具有不稳定的二价-NN– 成分，当环境温度升高时很容易被破坏。当冷却系统出现故障或其他事件发生时，自加速分解可能会导致失控反应并导致火灾、爆炸或泄漏。本研究调查了 2,2'-偶氮二异丁腈 (AIBN) 和 2,2'-偶氮二-2-甲基丁腈 (AMBN) 的爆炸特性、热稳定性参数、热危害和机理。我们使用20升仪器，排气口尺寸包2，同步热分析和差示扫描量热法在爆炸、绝热和动态条件下获得物质的爆炸曲线、热曲线和热力学参数。此外，采用微分等转化方法（Friedman 方法）和 ASTM E698 方程获得表观活化能Ë_一个。所有的实验结果表明，AIBN 比 AMBN 更危险。AIBN的E _a低于 AMBN。结果可用于构建偶氮化合物热危害数据库，供行业和相关研究领域搜索和参考实例使用。