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Copper Oxide Nano-Catalyst Incorporated TEGDN/NC/DAG Propellants: Thermal Behaviors and Kinetics
Propellants, Explosives, Pyrotechnics ( IF 1.8 ) Pub Date : 2022-06-13 , DOI: 10.1002/prep.202100364
Vahid Mirzajani 1 , Hamed Nazarpour‐Fard 2 , Khalil Farhadi 1 , Ali Ghobadian 3
Affiliation  

The copper oxide nanoparticles (nano-CuO)/nitrocellulose (NC)/triethyleneglycol dinitrate (TEGDN)/diaminoglyoxime (DAG) nanocomposites were successfully prepared as a convenient propellants. The catalytic effect of nano-CuO on the thermal behavior and the decomposition kinetics of the samples were precisely verified via thermogravimetry (TGA) and differential scanning calorimetry (DSC). The CuO nanoparticles significantly altered the thermal pattern of the studied energetic materials, e. g., the temperatures corresponded to the DSC peaks were changed by increasing the nano-CuO amount. Moreover, the catalyst resulted in the decrement in the activation energy of the decomposition stage by ∼30–50 kJ mol−1 and also improved the thermal stability of TEGDN/NC/DAG composite. The thermokinetic and thermodynamic parameters of the energetic nanocomposites were explained by using the Kissinger and Starink differential methods and the integral methods of Coats Redfern and Flynn-Wall-Ozawa. The mechanism function and the kinetic equation of the main exothermal decomposition step for the parent composite was found to be different from that of the 1–3 % CuO-contained nanocomposites.

中文翻译:

含有氧化铜纳米催化剂的 TEGDN/NC/DAG 推进剂:热行为和动力学

成功制备了氧化铜纳米粒子 (nano-CuO)/硝酸纤维素 (NC)/三甘醇二硝酸酯 (TEGDN)/二氨基乙二肟 (DAG) 纳米复合材料作为一种方便的推进剂。通过热重分析(TGA)和差示扫描量热法(DSC)精确验证了纳米CuO对样品热行为和分解动力学的催化作用。CuO 纳米粒子显着改变了研究的高能材料的热模式,例如。g.,对应于 DSC 峰的温度随着纳米 CuO 量的增加而改变。此外,催化剂导致分解阶段的活化能降低了~30-50 kJ mol -1还提高了 TEGDN/NC/DAG 复合材料的热稳定性。通过使用 Kissinger 和 Starink 微分方法以及 Coats Redfern 和 Flynn-Wall-Ozawa 的积分方法解释了高能纳米复合材料的热动力学和热力学参数。发现母体复合材料的主要放热分解步骤的机理函数和动力学方程与含 1-3% CuO 的纳米复合材料不同。
更新日期:2022-06-13
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