Preparation and characterization of a carborane polyurethane with excellent high carbon residue and flame retardancy

In this study, hydroxyl-terminated carborane polyarylates were directly reacted with isocyanates by direct main chain introduction method. Three carborane polyurethane resins were prepared by using polyarylates and isocyanates. The best curing process conditions were determined through curing kinetics research and experiments. TGA, DSC, XRD and variable temperature infrared spectroscopy were used to investigate the thermal properties. The combustion performance was studied by heat release rate (HRR), total heat release (THR) and limiting oxygen index (LOI). The surface morphology after heat treatment of carborane polyurethane resin and traditional polyurethane was observed by SEM method and focused on the stability of carborane polyurethane resin.