The Research Of Modified Nitramine Explosive And The Improved Propellant Coating Process That Based On The Low Temperature Plasma Technology

The particle reunion phenomenon is usually occured in the preparation of nanometer energetic materials. The particle reunion phenomenon seriously affects the performance and application of the energetic materials, and will cause its increase of the mechanical sensitivity. At the same time, solid propellant and debonding phenomena between the cladding layer will cause the change of the Engine combustion rule even explode. Therefore, it is particularly important to modify the Surface properties of the Can contain nanomaterials, to improve solid propellant coating technology and improve its bond strength is particularly important. For this reason, this topic applies low temperature plasma technology to modify nano nanometer HMX and RDX, improving its dispersibility; Applying the low temperature plasma technology improves the propellant coating process and improves the bond strength between the medicine column and cladding layer. The specific contents have the following three aspects:Firstly, applying the low temperature plasma technology modifies the nano nanometer HMX and RDX respectively, and explores the optimal technology conditions. Using fourier transform infrared spectroscopy (FT IR), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis the changes in the the Samples’structure and composition of the before and after processing. The experimental results show that:the modifed nano HMX and RDX’s molecular structure, crystal structure and composition have no obvious change;Secondly, using scanning electron microscope (SEM) and laser particle size instrument analysis the sample’s particle dispersion of the before and after processing. Using the thermogravimetric (TG) and differential scanning calorimetry (DSC) represents the sample’s thermal decomposition of the before and after processing and using the impact sensitivity instrument tests their impact sensitivity. The experimental results show that:The dispersion of the modified nano nanometer HMX and RDX got significantly better; The thermal decomposition properties changed little and the impact sensitivity was reduced by 10.2% and 10.2% respectively;Thirdly, applying the low temperature plasma technology modified the surface of the propellant and the cladding layer material respectively, improving the propellant coating process. Using the universal material testing machine tested the bond strength between the modified propellant and cladding layer, and than compared it with the traditional manual polishing process. The experimental results show that:after improving the propellant coating process, the Processing efficiency, processing quality and the degree of automation have significantly improvement and the bond strength between them is corresponds to the traditional polishing process.