| 초록 |
Polylactic acid(PLA) is well known as one of the bio-based polyesters and spotlighted because of its sustainable and biodegradable properties. However, PLA has brittleness and low toughness not enough to use for industrial applications such as car interior. PLA/ECOZEN and PLA/PBT-PTMG blend is designed to improve toughness and reduce brittleness of PLA. They are amorphous polyester(APE) and contain good toughness and flexural strength. The polyester blending proceeds by the transesterification reaction between PLA and APE. Transesterification can improve the poor mechanical properties of PLA by forming co-polyester consisting of PLA and APE. Joncryl® ADR, which contains epoxy groups, was introduced as a polymeric chain extender and compatibilizer in blends. Hydroxyl groups at the chain end of polyesters were expected to react with epoxy groups in ADR, leading to reduced phase separation. Mechanical property evaluation will be conducted after large-scale extrusion of PLA/APE/ADR. |
