Preparation of Nano-RDX-Based Polymer-Bonded Explosive and Its Improved Mechanical and Detonation Properties
G.-Z. Xu1, X.-D. Gao2, G.-L. Jin3, D.-Q. Wang1, Z.-M. Zhang1, T.-Y. Tan1, Y. Qin1, J. Liu1, F.-S. Li1
1National Special Superfine Powder Engineering Research Center of China, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, China
2Gan Su Yin Guang Chemical Industry Group Co. Ltd, Baiyin, China
3Gan Su Yin Guang Chemical Industry Group Co. Ltd, Baiyin,China
Keywords: nano-RDX, RDX-based PBX, compressive property, detonation property, mechanical properties
Abstract
Industrial micron-size hexahydro-1,3,5-trinitro-1,3,5-triazine (m-RDX) has been widely used in RDX-based polymer-bonded explosives (PBX). However, m-RDX results in poor mechanical properties and adhesive properties of RDX-based PBX m-RDX-PBX). Nano-RDX (n-RDX) has a small particle size and a large specific surface area, which provides a larger contact area with the polymer system. Thus, the porosity and compressive properties of PBX are improved if n-RDX is used in RDX-based PBX (RDX-PBX). In this study, m-RDX and n-RDX are used in RDX-PBX. The microstructure, component content, compressive properties, sensitivity properties, and detonation properties of RDX-PBX are investigated. The results show that n-RDX can make RDX-PBX more compact than m-RDX. The strain of n-RDX-based PBX (n-RDX-PBX) is increased by 39.7 % as compared to that of m-RDX-PBX. Meanwhile, the content of each component in n-RDX-PBX is consistent with that of the formula. The sensitivity of n-RDX-PBX is lower as compared to that of m-RDX-PBX, whereas the detonation velocity, detonation pressure, and detonation heat of n-RDX-PBX are equivalent to those of m-RDX-PBX.
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