A5084581973- Energetic Materials and Combustion
- Rocket and propulsion systems research
- High-Velocity Impact and Material Behavior
- Polymer crystallization and properties
- Microencapsulation and Drying Processes
- Thermal and Kinetic Analysis
- Electromagnetic Launch and Propulsion Technology
- Polymer Nanocomposites and Properties
Nanjing University of Science and Technology
2022-2024
The development of high energy gun propellants faces significant challenges in terms erosion, partly due to the inadequate effectiveness erosion inhibitors. In this paper, influence quite different flame temperature five gun-propellants on erosion-reducing efficiency four representative inhibitors materials (talc/TiO2/ PDMS/Paraffin) were studied vented vessel tester. From aspects morphologies and element compositions erode steel samples, as well pressure heat generated by propellant...
Energetic plasticizers are an essential component of propellants and have a significant impact on their performance, such as energy, combustion, mechanics. Therefore, there is practical value in understanding how affect the performance propellants. In this work, glass transition temperatures several energetic were compared. By adding with good compatibility propellant low temperature to propellant, nitramine gun containing different prepared through semi-solvent method. The compatibility,...
Drying is a complicated physical process which involves simultaneous heat and mass transfer in the removal of solvents inside propellants. Inappropriate drying techniques may result formation hard skin layer near surface to block free access most solvent through for long stick propellants with large web thickness, lead lower efficiency worse quality. This study aims gain comprehensive understanding clarify mechanism blocked propellant surface. A new three-dimensional coupled (3D-CHMT) model...
Nitroguanidine (NQ) in solvent-based triple-base propellants (STP) has a propensity to peel off and detach from the matrix, leading significant defects, such as interface debonding within propellant’s microstructure. This ultimately results reduced unstable mechanical properties. To address this critical issue, an efficient eco-friendly manufacturing process was employed successfully produce solventless (SLTPs) comparison conventional STPs. SLTP samples exhibit mutually supportive...
This paper initially contrasts the solvent-based and solventless molding processes, subsequently optimizing a sustainable efficient route for both STP SLTP. Key physicochemical parameters such as extrusion rate, residual volatile solvents, moisture content, apparent density of propellant types are meticulously compared. Furthermore, orientation crystal particles structure matrix-bound interface analyzed. Comprehensive examination triaxial progressive failure phenomena-including static...
A mixed nitrate ester propellant composed of nitrocellulose, nitroglycerin, triethylene glycol dinitrate, and dendrimer DP-2 was studied to explore the effects on rheological properties during solventless extrusion process. The results showed that apparent shear viscosity decreased gradually with increased mass fraction from 0 wt% 2 wt%. Additionally, it evident inclusion 0.5 leads a notable decrease in both torque screw by over 50%. However, contrast change fluidity observed wt%,...