| 초록 |
Poly(lactic acid) (PLA), an aliphatic polyester produced from 100% annually renewable biomasses such as corn starch, is a biodegradable, sustainable, and environmental-friendly thermoplastic polymer. With a development of mass production process over last years, PLA has received considerable attention as a promising material suitable for replacing petrobased polymers. However, the brittleness of PLA is a big drawback for its wide application. This work deals with the development of toughened PLA by reactive blending with ethylene copolymers bearing glycidyl moiety. The blends were prepared by a melt mixing in an internal mixer and mechanical and thermal properties of the blends were investigated by means of Izod impact test, tensile test, DSC, and DMA. Increasing the copolymer content in the blend improved the impact strength and strain to failure while decreasing the tensile strength and modulus values. And, the copolymer increased the ability of PLA to cold crystallization. |
