Thermal degradation behavior of polystyrene blended with propyl ester phosphazene

The thermal degradation behavior of polystyrene (PS) blended with propyl ester phosphazene (FR) was studied by thermogravimetric analysis (TGA) coupled with Fourier transform infrared spectroscopy (FTIR). The results showed that during thermal degradation the evolved gas product of polystyrene blends was similar to the gas product of pure PS, and that the thermal stability of polystyrene blends was slightly improved by the addition of FR. The major thermal degradation temperature and residual char yield of PS blends increased with increasing FR content. (C) 1997 Elsevier Science Limited.