A promising TNT alternative 3,3′-bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM): thermal behaviors and eutectic characteristics,RSC Advances

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A promising TNT alternative 3,3′-bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM): thermal behaviors and eutectic characteristics
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-14 , DOI: 10.1039/d0ra04517a
Xiong Yang ₁ , Jing Zhou ₁ , Xiaoling Xing ₁ , Yafeng Huang ₁ , Zhengfeng Yan ₁ , Qi Xue ₁ , Xiaofeng Wang ₁ , Bozhou Wang _{1,

2}

Affiliation

3,3′-Bi(1,2,4-oxadiazole)-5,5′-diylbis(methylene)dinitrate (BOM) is a liquid phase carrier for melt cast explosives that is expected to replace TNT. The combination of a conjugated 1,2,4-oxadiazole backbone and nitrate ester groups endows BOM with both good energetic performance and impressive insensitivity. In this paper, the thermal behaviors of BOM were investigated using a TG–DSC synchronous thermal analyzer, proving that BOM is basically non-volatile under heating and melting processes. The apparent activation energy of BOM calculated by the Kissinger method was 158.2 kJ mol⁻¹ at atmospheric pressure, which is higher than that of DNTF at atmospheric pressure and TNT at 2 MPa, indicating good thermal stability at low temperatures. The thermal decomposition mechanism of BOM was studied through both DSC-MS and in situ FTIR technologies. The low eutectic characteristics of BOM and DNTF were also investigated carefully and the best ratio of BOM/DNTF was 40/60 with a melting point at 75.5 °C. Finally, the detonation performances of TNT/HMX, BOM/HMX and BOM/DNTF(40/60)/HMX explosive formulations were calculated, showing that the detonation performances of the latter two formulations were significantly higher than that of TNT/HMX.

中文翻译：

一种有前景的 TNT 替代品 3,3'-bi(1,2,4-oxadiazole)-5,5'-diylbis(methylene)dinitrate (BOM)：热行为和共晶特性

3,3'-Bi(1,2,4-oxadiazole)-5,5'-diylbis(methylene)dinitrate (BOM) 是一种用于熔铸炸药的液相载体，有望取代 TNT。共轭的 1,2,4-恶二唑骨架和硝酸酯基团的组合赋予 BOM 良好的能量性能和令人印象深刻的不敏感性。在本文中，使用 TG-DSC 同步热分析仪研究了 BOM 的热行为，证明 BOM 在加热和熔化过程中基本上是非挥发性的。通过 Kissinger 方法计算的 BOM 表观活化能为 158.2 kJ mol ^-1在大气压下，高于大气压下的DNTF和2 MPa下的TNT，表明在低温下具有良好的热稳定性。通过DSC-MS和原位FTIR技术研究了BOM的热分解机理。还仔细研究了 BOM 和 DNTF 的低共晶特性，BOM/DNTF 的最佳比例为 40/60，熔点为 75.5 °C。最后，计算了TNT/HMX、BOM/HMX和BOM/DNTF(40/60)/HMX炸药剂型的爆轰性能，表明后两种剂型的爆轰性能明显高于TNT/HMX。

更新日期：2020-07-14

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