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- Title
3D 打印PLA/PPC 复合材料热学性能及力学性能的研究.
- Authors
金帅; 宋浩; 宋立新; 白楠; 刘立志; 史颖
- Abstract
In fused deposition modeling (FDM) 3D printing technology, poly(lactic acid) (PLA) has the disadvantage of poor toughness, which limits its application. Polypropylene carbonate (PPC) was melt blended with PLA, and PLA/PPC blends were printed by FDM 3D printing. The effects of PPC addition, 3D printing and injection molding on the thermodynamic properties, crystallization behavior and impact strength of PLA/PPC blends were studied. The results show that the addition of 30% PPC to PLA/PPC blends significantly improves the mobility and arrangement regularity of PLA molecular chains, thereby improving the crystallinity of PLA. FDM 3D printed PLA/PPC blends are deposited in a point manner during processing, and the cooling rate is faster than that of injection molding. The introduction of PPC increase the overall flexibility of PLA/PPC blends and improve the impact strength of PLA/PPC blends. When 30% PPC is added, the impact strength of PLA/PPC reached the maximum of 6 291 J/m². The impact strength of 3D printed PLA/PPC is only 3 150 J/m². 3D printed PLA/PPC blends have defects and voids, and their impact strength is smaller than that of injection molded samples.
- Subjects
FUSED deposition modeling; THERMODYNAMICS; IMPACT strength; THREE-dimensional printing; LACTIC acid
- Publication
Plastics Science & Technology / Suliao Ke-Ji, 2023, Vol 51, Issue 9, p68
- ISSN
1005-3360
- Publication type
Article
- DOI
10.15925/j.cnki.issn1005-3360.2023.09.015