Structure, Impurities, Thermal Stability and Thermal Stabilization of the Engineering Thermostable Resins Polyimide and Polysulfone Types

These polymers are exposed at high temperatures 300-360°C for short periods during the production and processing stages and for longer periods at 150-250°C.1-4 For temperatures over 300°C, organic substances become thermodynamically unstable. Thermal stability at the high temperatures used in processing are complex. Destructive damage occurring at the processing temperatures affects aging of the polymers during their operation. It is therefore desirable to analyse the structural and technological factors which influence the stability of polysulfones (PSF) and polyalkaneimides (P AI).