Modification of an N-Methyl Group toward a New Energetic Melt-Castable Material with a Good Energy-Stability Balance

Author:

Zhang Qinghua12,Wang Yi12,Chen Fang1,Song Siwei2

Affiliation:

1. Institute of Chemical Materials, China Academy of Engineering Physics

2. School of Astronautics, Northwestern Polytechnical University

Abstract

AbstractThe energy and stability properties of energetic materials are often contradictory to each other (e.g., high energy vs low thermal stability). There is no doubt that it is still challenging to explore the effective balance between energetic performance and molecular stability, especially for melt-castable materials. In this study, we selected the 4-methoxy-3,5-dinitropyrazole framework and a stable nitro group to design a new energetic melt-castable compound, namely 4-methoxy-3,5-dinitro-1-(nitromethyl)-1H-pyrazole (MDNNMP). Compared with the N-methylation product DMDNP and the nitrato-substituted derivative MC-7, MDNNMP exhibits a better balanced performance, including good thermal stability (Td : 203.7 °C), detonation velocity (Dv : 8099 m s–1) and impact sensitivity (20 J). The favorable balanced performance of MDNNMP suggests that it is a suitable candidate as a high-performance melt-castable material. Additionally, compared with the nitratomethyl group, the nitromethyl group demonstrates superior advantages in performance regulation.

Funder

National Natural Science Foundation of China

Publisher

Georg Thieme Verlag KG

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