Correlation Between Thermal Decomposition Characteristics And Burning Rate Of GAP Fuel-Rich Propellants

The curing system of GAP (Glycidyl Azide Polymer) has been studied. The processing techniques to manufacture GAP net polymer and GAP fuel-rich propellant were determined by means of careful selections of curing parameter,proper curative and crosslinking agent,addition of stabilizer and etc. The mechanic property of GAP propellant was modified by addition of chain extender. As a result,the GAP fuel-rich propellant was developed.By means of DSC and PDTA methods,the thermal decomposition characteristics of GAP model fuel-rich propellant and its ingredients at both 0.1 and 0.5 MPa were investigated. The actions of TMOs on the thermal decomposition properties of the above-mentioned system were studied. The results showed that the environmental pressure and catalysts have various actions on the thermal decomposition characteristics of the propellant and its ingredients.The burning rates of the GAP/TMO fuel-rich propellants were measured by use of the pipe-connected unchoked ducted rocket testing facility. The GAP fuel-rich propellant showed short ignition delay time,high burning rate,and sensitive to variation of gas generator pressure. The results also showed that some TMO,such as MoO3 and 0203 can increase the burning rate of the GAP fuel-rich propellant.The experimental results also showed that there is a correlation between the burning rates of GAP fuel-rich propellant and the thermal decomposition temperature of KP and GAP. The effective catalysts of AP thermal decomposition,Co2O3 and CuO,can also increase the burning rate of the GAP fuel-rich propellant.