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Both thermal decomposition behaviors and non‑isothermal decomposition reaction kinetics of propyl‑nitroguanidine (PrNQ) were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) method. Its decomposition mechanism was stuied through in‑situ FTIR spectroscopy technology and the compatibilities of PrNQ with 1,3,5‑trinitroperhydro‑1,3,5‑triazine (RDX), 1,3,5,7‑tetranitro‑1,3,5,7‑tetrazoctane (HMX), hexanitrohexaazaisowurtzitane (CL‑20) and 5,5′‑bistetrazole‑1,1′‑diolate (TKX‑50) were also achieved by DSC experiment. The results show that the melting point of PrNQ is around 99 ℃, which is very suitable for the application of melt‑cast technology. The thermal stability of PrNQ is good and the difference between the melting point and decomposition temperature of PrNQ is about 137 ℃, which is large enough to guarantee the safety of the melt‑cast process. The compatibilities between PrNQ and HMX or TKX‑50 are also excellent, with ΔTp of -0.3 K and 1.36 K， respectively.“,”采用差示扫描量热法(DSC)和热重分析(TGA)法研究了丙基硝基胍 （PrNQ）的热分解行为和非等温分解反应动力学，利用原位红外技术研究了PrNQ分子的分解机理，利用DSC实验研究了PrNQ与黑索今 （RDX），奥克托今（HMX），六硝基六氮杂异伍兹烷（CL‑20），5,5′‑联四唑‑1,1′‑二氧二羟铵 （TKX‑50）的相容性。结果表明，PrNQ的熔点约为99 ℃，可应用于熔铸炸药体系。PrNQ的热稳定性良好，PrNQ的熔融和分解温度相差约137 ℃，可保证熔铸工艺的安全性。根据DSC实验，PrNQ与HMX及TKX‑50的ΔTp分别为-0.3 K和1.36 K，表明其与HMX及TKX‑50相容性良好。