Poly (lactic acid)/Poly (butylene adipate-co-terephthalate) Blend and Its Composite: Effect of Maleic Anhydride Grafted Poly (lactic acid) as a Compatibilizer

摘要

Poly (lactic acid) (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) blend and its composite were prepared by melt blending method. Maleic anhydride grafted PLA (PLA-g-MA) prepared in-house was used as a compatibilizer to enhance the interfacial adhesion between PLA and PBAT and also to improve the dispersion of calcium carbonate (CaCO_3) in polymer matrices. Increasing PBAT content (10-30 wt%) resulted in the improvement of elongation at break and impact strength of PLA. Tensile strength, Young's modulus, and impact strength of PLA/PBAT blend improved with the presence of PLA-g-MA due to enhanced interfacial adhesion between PLA and PBAT. As CaCO_3 (5 wt%) was incorporated into the compatibilized blend, tensile strength, Young's modulus, and impact strength insignificantly changed while elongation at break decreased.