NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 38
·15115-15119
·
IF 3.069
Jifeng Chen,Yi Yu,Shujuan Zhang,Yuchuan Li,Siping Pang
3,3′-Difluoroazetidinium (DFAZ) possesses a high-tensile four-membered ring and fluorine atoms, which contributes to the specific impulse, detonation pressure and detonation velocity. High-density energetic salts that contain oxygen-rich anions and cations were synthesized. All of the salts were fully characterized by IR spectroscopy, single-crystal X-ray diffraction, elemental analysis, differential scanning calorimetry (DSC) as well as impact and friction sensitivity. Their detonation properties were calculated according to the densities and heats of formation. The results showed that compared to ADN, they all had a relatively high density and low impact sensitivity. The specific impulse of almost all of the salts were higher than that of the propellant component, ammonium dinitramide (ADN, Isp = 202 J). Moreover, the 3,3′-difluoroazetidinium nitroformate salt had the highest specific impulse and was relatively more stable. It is possible to obtain energetic cations with good properties by combining four-membered high-tension rings with fluorine atoms.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 54
·48590-48598
·
IF 3.289
Yu Shang,Bo Jin,Rufang Peng,Zhicheng Guo,Qiangqiang Liu,Jun Zhao,Qingchun Zhang
A series of nitrogen-rich heterocyclic 1H,1′H-5,5′-bistetrazole-1,1′-diolate salts, namely, 1,2,4-triazolium (2), 3-amino-1,2,4-triazolium (3), 4-amino-1,2,4-triazolium (4), 3,5-diamino-1,2,4-triazolium (5), 2-methylimidazolium (6), imidazolium (7), pyrazolium (8), 3-amino-5-hydroxypyrazolium (9), dicyandiamidine (10), and 2,4-diamino-6-methyl-1,3,5-triazin (11), was synthesized with cations. These energetic salts were fully characterized through FT-IR, 1H NMR, 13C NMR, and elemental analysis. The structures of 2, 3·7H2O, 6·2H2O, 8, and 10·4H2O were further confirmed through single crystal X-ray diffraction. Their thermal stabilities were investigated through differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results indicated that all of the salts possess excellent thermal stabilities with decomposition temperatures ranging from 225.7 °C to 314.0 °C. On the basis of the Kamlet–Jacobs formula, we carefully calculated their detonation velocities and detonation pressures. All of the salts, except 11, exhibit promising detonation performances with a detonation pressure of 20.23–28.69 GPa and a detonation velocity of 7050–8218 m s−1. These values are much higher than those of TNT. The impact sensitivities of the compounds were determined via a Fall hammer test. All of the compounds show excellent impact sensitivities of >50 J, and this finding is higher than that of TATB (50 J). Therefore, these ionic salts with excellent energetic properties could be applied as new energetic materials.
研究领域:
化学
·
材料科学
·
高能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）