Iranian Scientific Association of Energetic Materials

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In this study, the effect of Fe3O4-coated graphene as a nanocatalyst on the degradation kinetics of Ammonium Perchlorate and Glysydyl Azide Polymer (AP/GAP) composite propellants is investigated in order to modify and improve the burning rate of propellants. The SEM-EDX and EDX-Mapping surface analysis methods were used for structural and morphological study of the propellant containing nanocatalyst. The results showed that all the samples were homogenous. Thermal analysis techniques (DSC and TG) were used in the presence and absence of the nanocatalyst in order to investigate the thermal behavior of the propellant. The results showed that Graphene@Fe3O4 could reduce decomposition temperature and merge decomposition peaks of AP. This will probably speed up the process of thermal decomposition of AP in the propellant. Moreover, the thermal decomposition kinetics of the samples was investigated using TGA analysis data and Friedman, Ozawa, and Flynn-Wall-Ozawa (FWO) methods. Then the activation energy of the samples was calculated. The results showed that the required activation energy in the presence of Graphene@Fe3O4 was less than the propellant in the absence of the catalyst, which in turn improves their performance.

Keywords: AP/GAP propellants, Graphen coated by Fe3O4, Kinetic thermal decomposition, Ozawa, Freidman, Flynn-Wall-Ozawa.

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