钨含量对氟聚物基含能材料放热反应与燃烧性能的影响

In order to explore the effect of tungsten on the exothermic reactions and combustion performance of fluoropolymer-based energetic materials, the fluoropolymer-based energetic materials with different contents of tungsten were prepared by using dual ball milling process. The microstructures of the prepared energetic materials before and after combustion reaction were characterized via SEM and XRD. The energy release density and reaction mechanism of exothermic reaction of energetic materials were analyzed by using oxygen bomb calorimeter and thermal analyzer (TG-DSC). The high-speed thermographic camera was used to evaluate the combustion characteristics of energetic materials. The results show that the energy release density of exothermic reactions of fluoropolymer-based energetic materials decreases from 3 690J/g to 2 695 J/g, and the burning rate decreases from 40. 5 mm/s to 19. 6mm/s as the tungsten content increases from 0 to 30% . The combustion flame temperature of the energetic material without tungsten is the lowest. As the tungsten content increases, the combustion flame temperature increases significantly then decreases slowly. This maybe due to the addition of tungsten diminishes the heat transfer of the exothermic reaction between Al and PTFE, which delays the exothermic reaction process between Al and Fe₂O₃. The produced W₂C after adding tungsten cause more accumulative stacking of exothermic reactions, resulting in more intense combustion reaction and higher combustion flame temperature of fluoropolymer-based energetic materials.