Combustion mechanism of the low signature propellant containing 1,7-diazido-2,4,6-trinitrazaheptane(dath)

The thermal decomposition behavior of the low signature (LS) propellant containing 1,7-diazido-2,4,6-trinitrazaheptane(DATH) is investigated by DSC, TG and DTG technique. Several analysis methods are used to study the physico-chemical structure of surface before and after combustion and the burning flame structure of this kind of propellant. Because DATH decomposes to produce a great quantity of N2, the physico-chemical structure of burning surface of the propellant is obviously different from that of RDX-CMDB (Composite Modified Double-Base) propellant. It's mainly N2, that gives rise to forming a lot of pores on the burning surface for its release. These pores can increase the burning rate because of extending the burning surface and increasing thermal-transfer intensity. In comparison with decomposition and combustion process of RDX-CMDB propellant, the propellant containing DATH creates the different decomposition products from the condensed phase to the fizz zone.