| 초록 |
Poly (lactic acid) (PLA) is the most promising eco-friendly polymer that is expected to replace the use of commodity plastic. However, the inherent low toughness and brittleness of PLA was limited to the application of various industries. Herein we developed a new highly ductile PLA chain extender using ionic bonding. Acrylic-based chain extender was designed by adding tertiary amine which can form ionic bonding with COOH at terminated PLA. The brittle PLA has ductility depending on the amount of chain extender added. In addition, we found that ductile PLA can return to its original brittleness by pH or heat. The properties of the added PLA was investigated by tensile testing, dynamic mechanical analysis, rheometer, FT-IR, NMR, etc. |
