The pyrolysis characteristics of tetrazolo[1,5-a]pyridine were investigated by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The apparent activation energy (E_α) was estimated with DSC and various kinetic analysis methods, and it was determined that the decomposition of tetrazolo[1,5-a]pyridine follows the Avarami-Erofeve (A₂) reaction pattern. The thermal safety and thermodynamic parameters were calculated. In addition, the thermal runaway behavior and kinetic parameters under adiabatic conditions were studied by employing an adiabatic accelerating calorimeter (ARC). Thermogravimetric-photoionization mass spectrometry (TG-MS) was used to identify the vapor phase products of the pyrolysis process. The different decomposition pathways were analyzed by density functional theory (DFT). The main decomposition products were N₂, C₂H₂ and HCN according to TG-MS experiments and theoretical calculations. The most likely proposed decomposition mechanism proceeded through the opening of the tetrazole ring to dissociate N₂ and the rupturing of the pyridine ring to release C₂H₂ and HCN. The findings of these experiments and theoretical calculations can contribute to the determination of safety precautions for possible heat hazard accidents during the handling, transportation, use and storage of tetrazolo[1,5-a]pyridine.

通过热重分析(TG)和差示扫描量热法(DSC)研究了四唑并[1,5-a]吡啶的热解特性。用DSC和各种动力学分析方法估算了表观活化能（E _α），并确定四唑并[1,5-a]吡啶的分解遵循Avarami-Erofeve（A ₂) 反应模式。计算了热安全和热力学参数。此外，通过采用绝热加速量热计（ARC）研究了绝热条件下的热失控行为和动力学参数。热重-光电离质谱 (TG-MS) 用于鉴定热解过程的气相产物。通过密度泛函理论（DFT）分析了不同的分解途径。根据TG-MS实验和理论计算，主要分解产物为N ₂、C ₂ H ₂和HCN。最有可能提出的分解机制是通过打开四唑环来解离 N ₂并且吡啶环破裂以释放C ₂ H ₂和HCN。这些实验和理论计算的结果有助于确定在处理、运输、使用和储存四唑并[1,5-a]吡啶过程中可能发生的热危害事故的安全预防措施。