EFFECT OF POLY(BUTYLENE ADIPATE-CO-TEREPHTHALATE) CONTENTS ON CRYSTALLIZATION AND MECHANICAL PROPERTIES OF POLYMER BLENDS OF POLY(LACTIC ACID) AND POLY (BUT YLENE SUCCINATE)-CO-ADIPATE

摘要

The effect of poly(butylene adipate-co-terephthalate) (PBAT) on crystallization and mechanical properties of poly(lactic acid) (PLA) and poly(butylene succinate-co-adipate) (PBS A) blend was studied. PLA and PBS A were blended in a twin screw extruder, which incorporated PBAT as a ternary component in PLA/PBSA blend. The ratio of PLA/PBSA was set at 80/20. The contents of PBAT were varied from 0 to 50 wt%. The thermal properties and crystallization behavior of PLA/PBSA/PBAT blends were analyzed by differential scanning calorimetry. The effect of PBAT contents on non-isothermal crystallization kinetic of the composites was investigated by using Avrami equation. Tensile modulus and tensile strength of the PLA/PBSA blends decreased when increasing PBAT contents. It can be noted that the addition of 20 wt% PBAT showed the maximum impact performance of the PLA/PBSA blends.