Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication
Polylactide (PLA) is a kind of distinct semicrystalline polymer and widely applied for fused filament fabrication (FFF), because of its low price and high mechanical properties. But the bad interface of FFF printed PLA parts and their high mechanical anisotropy limit their industrial application dee...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Polymer Testing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941822003269 |
| _version_ | 1817984775383678976 |
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| author | Ning Yu Guanghui Jing Jie Yang Zhi Wang Qi Zhang Jing Li |
| author_facet | Ning Yu Guanghui Jing Jie Yang Zhi Wang Qi Zhang Jing Li |
| author_sort | Ning Yu |
| collection | DOAJ |
| description | Polylactide (PLA) is a kind of distinct semicrystalline polymer and widely applied for fused filament fabrication (FFF), because of its low price and high mechanical properties. But the bad interface of FFF printed PLA parts and their high mechanical anisotropy limit their industrial application deeply. In this work, an innovative FFF 3D printer with a rotary shear head was developed to control the interface and crystallization of FFF printed PLA parts. Compared with traditional FFF, the tensile strength of specimen fabricated via the rotary shear field increases from 21.1 MPa to 59.3 MPa, and the degree of mechanical anisotropy decreases from 0.41 to 0.09. As indicated by the meso-structure morphologies, not only the triangular voids between adjacent strands were disappeared, but also the randomly-distributed shish-kebab structure crystals and fibrils were obtained by the rotary shear field treatment. And the DSC results showed a high crystallinity value of 26.1% of specimen with the rotary shear field treatment. Therefore, the good interface, randomly-distributed crystals and high crystallinity contribute the effort to increase the tensile strength and decrease the degree of mechanical anisotropy of FFF printed PLA parts. |
| first_indexed | 2024-04-13T23:49:15Z |
| format | Article |
| id | doaj.art-bb8b24b27eb74bf1b4bbee56b3403d69 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-04-13T23:49:15Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-bb8b24b27eb74bf1b4bbee56b3403d692022-12-22T02:24:11ZengElsevierPolymer Testing0142-94182022-12-01116107805Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabricationNing Yu0Guanghui Jing1Jie Yang2Zhi Wang3Qi Zhang4Jing Li5Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chongqing Key Laboratory of Additive Manufacturing Technology and Systems (CIGIT, CAS), Chongqing, 400714, China; Corresponding author. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaUniversity of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaChongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Chongqing Key Laboratory of Additive Manufacturing Technology and Systems (CIGIT, CAS), Chongqing, 400714, China; Corresponding author. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.Polylactide (PLA) is a kind of distinct semicrystalline polymer and widely applied for fused filament fabrication (FFF), because of its low price and high mechanical properties. But the bad interface of FFF printed PLA parts and their high mechanical anisotropy limit their industrial application deeply. In this work, an innovative FFF 3D printer with a rotary shear head was developed to control the interface and crystallization of FFF printed PLA parts. Compared with traditional FFF, the tensile strength of specimen fabricated via the rotary shear field increases from 21.1 MPa to 59.3 MPa, and the degree of mechanical anisotropy decreases from 0.41 to 0.09. As indicated by the meso-structure morphologies, not only the triangular voids between adjacent strands were disappeared, but also the randomly-distributed shish-kebab structure crystals and fibrils were obtained by the rotary shear field treatment. And the DSC results showed a high crystallinity value of 26.1% of specimen with the rotary shear field treatment. Therefore, the good interface, randomly-distributed crystals and high crystallinity contribute the effort to increase the tensile strength and decrease the degree of mechanical anisotropy of FFF printed PLA parts.http://www.sciencedirect.com/science/article/pii/S0142941822003269Polylactide (PLA)3D printingFused filament fabrication (FFF)Rotary shear fieldAnisotropy |
| spellingShingle | Ning Yu Guanghui Jing Jie Yang Zhi Wang Qi Zhang Jing Li Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication Polymer Testing Polylactide (PLA) 3D printing Fused filament fabrication (FFF) Rotary shear field Anisotropy |
| title | Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| title_full | Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| title_fullStr | Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| title_full_unstemmed | Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| title_short | Effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| title_sort | effects of a rotary shear field on the interlayer bond and mechanical properties of polylactide fabricated using fused filament fabrication |
| topic | Polylactide (PLA) 3D printing Fused filament fabrication (FFF) Rotary shear field Anisotropy |
| url | http://www.sciencedirect.com/science/article/pii/S0142941822003269 |
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