4. Conclusions
In this research, the ratio of PET and PBS of 90:10 was found to be the most clarity. The more PBS content in the
blends it was, the more haziness of the thin film it would be. The compatibility of PET and PBS blends was
investigated by differential scanning calorimeter and found that the melting temperature of PET/PBS blends were
completely separated due to immiscibility of polymer blend. Thermal stability was investigated by thermogravimetric
analyzer. A noticeable drop of the degradation temperature of PET/PBS blends was observed with the addition of
PBS at higher content. Mechanical properties of PET/PBS blends thin film were studied by universal tensile testing
and showed the decrement of tensile strength, young’s modulus and percentage elongation at break compared with
pure PET thin film.
The addition of TiO2 made film less transparency than ZnO because TiO2 particles were physically smaller than
ZnO particles. In addition, we found that TiO2 increased thermal stability of PET/PBS blends. The addition of TiO2
and ZnO would not significantly increase tensile strength, young’s modulus and percentage elongation at break. The
result of antibacterial testing of PET/PBS blends thin film with TiO2 exhibited better performance of inhibiting
E.coli and S.aureus bacteria than the one with ZnO.