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Thermal Decomposition of Rigid Polyurethane Foams/RDX Gun Propellants

WEITAO YANG, ZICHAO LI, RUI HU, XIA XIAO, JIANXING YANG

Abstract


Thermal decomposition of foamed propellant based on rigid polyurethane foams and 1,3,5- trinitro-1,3,5-triazinane (RDX) was studied by TG and DSC. The exothermal reaction kinetics was studied by differential scanning calorimetry (DSC) in no-isothermal conditions at different heating rates in atmosphere and high pressures. The results showed: With the increase of pressure, the peak temperature and the decomposition heat rises. Meanwhile, the decomposition curves presented secondary exothermic peaks under high pressures, resulting from autocatalysis and self-heating. The activation energy obtained by Kissinger and Ozawa methods is similar, and with the pressure increased, the activation energy deceased. The critical temperature of thermal explosion is lower than RDX.


DOI
10.12783/ballistics2019/33033

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