Propellants Explosives Pyrotechnics, Vol.45, No.6, 974-980, 2020
Thermodynamics and Kinetics of Curing Reaction Between Azide Binder ATP and Bispropargyl Succinate
The thermodynamics and kinetics of the curing reactions between azide binder ATP and bispropargyl succinate (BPS) were studied by using a microcalorimeter. On the basis of experimental and calculated results, three thermodynamic parameters (i. e., the activation enthalpies, the activation entropies, the activation free energies), the rate constant, three kinetic parameters (i. e., the activation energies, the pre-exponential constant and the reaction order) and the enthalpies of the curing reactions between ATP and BPS in the temperature range of 323.15-338.15 K were obtained, showing that the main reaction leading to a triazole structure easily took place in the studied temperature. The linear relationship between lnk and the molar ratio of triple bonds to azide groups was found. Furthermore, the corresponding kinetic equation describing the curing reaction between ATP and BPS was d alpha/dt=10(-4.12)(1-alpha)(1.01) at 333.15 K.