Citation

Lei C, Yang H, Zhang Q, Cheng G. ACS Appl. Mater. Interfaces 2022; ePub(ePub): ePub.

Copyright

(Copyright © 2022, American Chemical Society)

DOI

10.1021/acsami.2c12365

PMID

35989560

Abstract

The introduction of azido groups into the energetic skeleton has the advantages of increasing the energy level. In this work, a series of azido compounds with good stability and low sensitivity as well as tetrazole-fused compounds based on energetic salts are synthesized. The detonation pressures and velocities of these new compounds fall in the ranges of 18.9-27.3 GPa and 7153-8450 m s(-1), respectively. The detonation velocity of the tetrazole-fused compounds based on the potassium salts 3, 6, and 7 are 7810, 7153, and 7989 m s(-1), respectively. Also, their decomposition temperatures (244, 237, and 240 °C, respectively) are higher than that of traditional explosive RDX (204 °C). Notably, two representative compounds 2 and 5 possess higher decomposition temperature (2: 196 °C and 5: 178 °C) and overall detonation properties (2: D = 8129 m s(-1) and P = 26.6 GPa and 5: D = 8336 m s(-1) and P = 27.3 GPa) as well as relativity lower sensitivities (2: IS = 12 J and FS = 240 N and 5: IS = 10 J and FS = 144 N) than that of primary explosive 2-diazo-4,6-dinitrophenol (T(d) = 157 °C, D = 6900 m s(-1), P = 24.7 GPa, IS = 1 J, and FS = 24.7 N). Moreover, the initiation capacity of compounds 2 and 5 was also assessed through the initiation tests. The results indicate that the two compounds could be a promising environmentally friendly primary explosive.

Language: en

Keywords

azido groups; low sensitivity; metal-free; primary explosive; tetrazole-fused