Premium
Preparation and Properties of HMX Coated with a Composite of TNT/Energetic Material
Author(s) -
An Chongwei,
Wang Jingyu,
Xu Wenzheng,
Li Fengsheng
Publication year - 2010
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.200900060
Subject(s) - materials science , thermal decomposition , coating , x ray photoelectron spectroscopy , detonation , scanning electron microscope , composite material , decomposition , solvent , composite number , energetic material , chemical engineering , thermal , analytical chemistry (journal) , explosive material , chemistry , chromatography , organic chemistry , thermodynamics , physics , engineering
To improve the safety of HMX without sacrificing energy properties, the composites of TNT and an energetic material (HP‐1) were used to coat HMX particles by a method of integrating solvent–nonsolvent with aqueous suspension‐melting. SEM (scanning electron microscopy) and XPS (X‐ray photoelectron spectrometry) were employed to characterize the samples. The effect of the processing parameters, such as mass ratio of HP‐1 to TNT (MRHT), stirring speed, and cooling rate, on the quality of coated samples were investigated and discussed. The mechanical sensitivity, thermal sensitivity, thermal decomposition characteristic, and heat of detonation of raw and coated HMX samples were also measured and contrasted. Results show that when MRHT, stirring speed in the second stage and cooling rate are 1 : 5, 1000 r⋅min −1 and 5 °C⋅min −1 respectively, the optimal coating effect is achieved. Compared with that of raw HMX, both impact and friction sensitivity of HMX coated with 2.5 wt.‐% TNT and 0.5 wt.‐% HP‐1 decrease obviously, whereas there is a slight change in their thermal sensitivity and thermal decomposition characteristics. Meanwhile, such surface coating does not result in the decrease of its energy properties.