Study on Thermal Decomposition Characteristics of Glycidyl Azide Polymer

The thermal decomposition characteristics of Glycidyl Azide Polymer(GAP)at heating rates of 2,5,10 and 20 K·min-1 were respectively investigated by the means of differential scanning calorimetry(DSC)and Thermal gravimetric analysis(TG).On this basis,the kinetic parameters and the thermodynamic parameters were also calculated and studied.Results show that Glycidyl Azide Polymer(GAP)has high thermal decomposition peak temperature and good thermal stability.The apparent activation energy,the pre-exponential factor,and the decomposition rate constant of thermal decomposition at 120 ℃ was respectively calculated by the modus of Kissinger and Ozawa-Doyle,and the corresponding results were 212.66 kJ·mol-1,2.0×1021 s-1 and 1.1×10-7 s-1.The values of entropy of activation,enthalpy of activation and free energy of activation of the reaction at 218 ℃ are 127.13 J·mol-1·K-1,196.8 kJ·mol-1 and 134.38 kJ·mol-1.