Propellants Explosives Pyrotechnics, Vol.40, No.6, 808-813, 2015
Study on Curing Reaction Thermokinetics of Azide Binder/Bispropargyl Succinate by Microcalorimetry
The thermokinetics of the curing reactions between poly-(3-azidomethyl-3-methyloxetane) (PAMMO) and bispropargyl succinate (BPS) were studied using a microcalorimeter. On the basis of experimental and calculated results, three thermodynamics parameters (the activation enthalpies, the activation entropies, the activation free energies), the rate constant, three thermokinetic parameters (the activation energies, the pre-exponential constant, and the reaction order) and the enthalpies of the curing reactions between PAMMO and BPS in the temperature range of 50-65 degrees C were obtained, showing that the main reaction leading to a triazole structure easily took place in the studied temperature range. The linear relationship between ink and the molar ratio of triple bonds to azide groups was found. Furthermore, the corresponding kinetic equation describing the curing reaction between PAMMO and BPS was d alpha/dt=10(-4.48)(1-alpha)(0.962) at 333.15 K.
Keywords:Poly-(3-azidomethyl-3-methyloxetane) (PAMMO);Bispropargyl succinate (BPS);Curing;Microcalorimeter;Thermokinetics