Research Of Coating-layer And Interfacial Characteristic Of Low Temperature Sensitivity Coefficient(LTSC) Propellant

In this dissertation, the coating-layer and interfacial characteristic of low temperature sensitivity coefficient (LTSC) coating propellant and polymer-deterred propellant have been studied theoretically and experimentally. The principle of LTSC charge has been explained theoretically, and the importance of realizing this technology through coating-layer and interfacial characteristic has been spelled out too. By the method of making coating-film, the interior-exterior layer performances of coating propellant have been studied simulatively in detail, a series of apparatus and means for testing broken-hole rate have been designed, and the model for simulating the broken-hole process of coating-layer at pure mechanical action has been put forward. Mechanical and burning performances of interior-exterior coating-layer have been researched at different temperature. Strength of coating-layer has been calculated theoretically and compared with actual value. Using interfacial processing reagent, the method of improving affix-intensity between coating-layer and base-propellant of high nitrogenous content single-base propellant has been put forward, and it's effect has been confirmed by gunshot test. Combining polymer fracture mechanics, broken-hole of coating-layer and LTSC mechanism have been studied. Retardation of flaming of exterior-layer has been discussed, and the burning-broken-hole model of coating-layer has been advanced synthetically, it shows that simulation were in good agreement with experimental data. The polymerizing process of diethyleneglycol dimethacrylate(EDMA), characteristic of interface between single-base propellant coating-layer and base propellant deterred with PEDMA have been studied, and LTSC mechanism of such propellant has been put forward. The research productions can be used to comprehend LTSC mechanism further and control the quality of coating propellant.