Poly(lactide)/Poly(ethylene carbonate) 블렌딩 필름의 제조 및 특성 연구

초록

From poly(lactide) (PLA) and poly(ethylene carbonate) (PEC) synthesized using CO₂, a PLA/PEC blending film is prepared by melt extrusion and then drawn to uniaxial orientation with various draw ratios. The structural conformation was confirmed and the mechanical, thermal and barrier properties were investigated. It was confirmed that the PLA/PEC blending sheet and films were composed of α" phase form. The strain-induced crystallization and molecular orientation of PLA/PEC films of α" phase increased with increasing the draw ratio. It improves the physical properties of the film. With amorphous PEC blending, the mechanical properties of PLA/PEC blending films were slightly lower than those of net PLA films, however, the flexibility and barrier properties were higher. In this study, the PLA/PEC blending film is expected to be commercialized as an ecofriendly flexible packing film.

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