3.1.3 Thermogravimetric Analyzer (TGA)
Thermal stability of polymer blend was investigated by Thermogravimetric Analyzer. Fig. 2 showed onset
temperature (Tonset) of PET and PBS at 416 oC and 357 oC, respectively. While the degradation temperatures (Td) of
PET and PBS were at 429 oC and 385 oC, respectively. It was found that Tonset and Td of PET/PBS blends were
between those of pure PET and pure PBS. Thermal stability of PET/PBS blends is decreased with increasing PBS
content because PBS had lower heat stability than PET.