Effect of different BPS concentration on the thermal decomposition and thermal stability properties of GAP curing

Abstract

ABSTRACTIn order to study the optimal ratio of the degree of bis-propargyl-succinate (BPS) cures Glycidyl azide polymer (GAP), the thermal kinetics of BPS cured system was investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), the thermal stability and mechanical properties were studied. GAP was cured by the reaction of the azide group with BPS through a 1,3-dipolar cycloaddition reaction to form a 1,2,3-triazole network. It was found that the DSC curves of the BPS cured system show an obvious exothermic peak at around 230–260°C for each sample at different heating rates. TG-DTG curves of the BPS/GAP system exhibit two major stages of mass loss for different samples at different heating rates. When the mass ratio of BPS and GAP is 0.4:1, the thermal stability and mechanical properties were optimal. Meanwhile, the activation energy and frequency factor are calculated by Kissinger and Flynn–Wall–Ozawa methods by non-isothermal thermoanalytical data, the kinetic parameters proved that 0.4 BPS sample shows high thermal stability and the parameters are significant for further research of curing system.