Researches on Thermal Decomposition Kinetics of Composite Modified Double‐base Propellants

Abstract

The thermal decomposition kinetics of composite modified double-base (CMDB) propellants with a series of contents of hexogeon (RDX) was investigated by using parameters of T eo , T i , T p , T f , T b , T a , E, lg A and ∆H, which were obtained from using a CDR-4P differential scanning calorimeter (DSC) and Perkin-Elmer Pyris 1 thermogravimetric analyzer (TG) analyses with heating rates of 5, 10, 15 and 20 K/min. Reliable activation energy was calculated using Flynn-Wall-Ozawa method before analyzing the thermal decomposition mechanism. TG-DTG curves were treated with Malek method in order to obtain the reaction mechanisms. The obtained results show that the thermal decomposition mechanisms with the conversion from 0.2 to 0.4 was f(α)＝1/2α, and with the conversion from 0.5 to 0.7 was f(α)＝(1/4)(1-α) [-ln(1-α)] -3 .

Thermal Decomposition Kinetics of High Impact Polystyrene/Organo Fe‐montmorillonite Nanocomposites

“…Flynn-Wall-Ozawa method, [18,19] which is essentially the same as that of Flynn and Wall, represents a relatively simple method of determining activation energy directly from mass loss versus temperature data obtained at several heating rates. Eq.…”