基 于 新 型 氟 碳 黏 合 剂 的 固 体 推 进 剂 燃 烧 性 能

The agglomeration of condensed phase during the combustion process of propellant is one of the main reasons for energy loss and nozzle ablation，and the introduction of fluorine into propellant is considered to be an effective way to solve the agglomeration. In order to solve the condensed phase agglomeration of aluminum，a fluoroalcohol compound was introduced into the traditional HTPE propellant，and it was integrated into the binder cross-linked network through the curing reaction to form a solid propellant based on a novel fluorocarbon binder. Thermogravimetric（TG）and laser ignition were used to characterize the thermal decomposition and the burning intensity of the propellant. The combustion surface flame morphology and particle size distribution of combustion condensed phase products were characterized by scanning electron microscope（SEM）and EDS. The results show that the weight loss of the propellant after adding PFD still includes three main stages，but PFD will cause the decomposition of RDX in the propellant to be delayed by 15-20 ℃. Moreover，the fluorine-containing segment will completely decompose and lose weight before 250 ℃. Compared with the blank propellant sample，the propellant containing PFD has higher burning brightness at the same ignition time. With the increase of PFD，the intensity of the combustion flame of the propellant sample increases significantly，and the flame jet is more intense. The average particle size of condensed phase products decreased gradually from 5.13 μm（1%PFD）to 1.04 μm（5%PFD）.