| 초록 |
3D printing is one of the important technologies of the fourth industrial revolution. Fused deposition modeling (FDM)-typed 3D printing is convenient and inexpensive to be applied in a lot of industries compared to other sorts of 3D printing. As a representative FDM-typed filament material, in particular, an eco-friendly bioplastic polylactic acid (PLA) which can replace petroleum-based plastics has attracted because of good crack resistance and shrinkage. However, PLA shows a low impact strength to be used as filament of FDM-type 3D printing because of its slow crystallization rate. To increase its crystallization rate and thus improve the impact strength, in this study, PLA was melt-blended with the twin screw extruder into poly(butylene-adipate-co-terephthalate) and talc as an impact modifier and nucleating agent, respectively. Also, we investigated the relationship between the improved impact strength and fast crystallization rate of PLA blends rather than those of neat PLA. |
