Thermal stability of lignin-hydroxy-terminated polybutadiene copolyurethanes

摘要

The thermal stability of lignin-hydroxy terminated polybutadiene (HTPB) copolyurethane and HTPB polyurethane has been studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and isothermal aging in air at various tem- peratures. All the results show better thermal stability of lignin--HTPB copolyurethane than that of HTPB polyurethane. The structural changes in the polyurethanes during isothermal heating have also been studied by IR spectroscopy.