Abstract: The thermolabile characteristics of extruded polystyrene (XPS) with different heating methods were studied by the heating rate of 10K/min, as well as the release of the gas during the heating procedure .The sample was tested by Thermogravimetry- Infrared (TG- FTIR). The expansion and contraction of the sample with the heating procedure was carried out in Sintering Image Instrument (SII) to determine the temperature of melting and flow; The flow temperature of 212℃.

Key words: extruded polystyrene (XPS), sintering, thermal- infrared (TG- FTIR)