Thermal Decomposition Kinetics of PDADN-RDX-CMDB Propellant at High Pressure

摘要

The thermal analysis technique of pressure differential scanning calorimetry (PDSC) andrnthermogravimetry and derivative thermogravimetry (TG-DTG) were used to investigate the influence of pressurernand PDADN content on the thermal decomposition of PDADN-RDX modified double base propellant. As arnresult, it is indicated that the apparent activation energy E_a of decomposition of double base components is lowerrnthan that of RDX in PDADN-RDX modified double base propellant. E_a of decomposition of double base isrnreduced and that of RDX is increased by pressure. If NG is replaced by PDADN partly, E_a of decomposition ofrndouble base and RDX are all reduced. On the contrary, if RDX is replaced by PDADN partly, E_a of decomposition rnof double base and RDX are all increased. These results are explained by decomposition mechanism in this paper.