Synthesis,Characterization and Stability of Triblock Copolymer Based on Tetrahydrofuran and Glycidylazide as Binder

In this work, a triblock copolymer polytetrahydrofuran–block-poly(glycidyl azide)–block-polytetrahydrofuran was synthesized through ring-opening polymerization of epichlorohydrin and tetrahydrofuran catalyzed by BF₃-diethyl ether at 30°C, and further modification. The structure of the polymer was verified by IR, ¹H and ¹³C NMR spectroscopy. The decomposition and kinetic parameters of the block copolymer such as its activation energy and frequency factor were determined using the differential scanning calorimetry and thermo-gravimetric analysis. The results revealed that the main thermal degradation for the copolymer occurs in the temperature range of 220–250°C. Finally, the effect of polytetrahydrofuran content on the thermal stability and decomposition temperature of the overall copolymer was investigated.