Crystallisation behaviour of polyamide-12 during additive manufacturing process
Polyamide 12 (PA12) is a semi-crystalline polymer as its crystallisation behaviour varies due to manufacturing conditions. In this work, the crystallisation behaviour of PA12 was observed through experiments conducted at a constant cooling rate from different maximum heated temperatures. From the di...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170440 |
| _version_ | 1811696753245683712 |
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| author | Teo, Benjamin How Wei Li, Weidong Chen, Kaijuan Zeng, Jun Du, Hejun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Teo, Benjamin How Wei Li, Weidong Chen, Kaijuan Zeng, Jun Du, Hejun |
| author_sort | Teo, Benjamin How Wei |
| collection | NTU |
| description | Polyamide 12 (PA12) is a semi-crystalline polymer as its crystallisation behaviour varies due to manufacturing conditions. In this work, the crystallisation behaviour of PA12 was observed through experiments conducted at a constant cooling rate from different maximum heated temperatures. From the differential scanning calorimetry (DSC) experiment, PA12 exposed at a higher temperature crystallised at a lower temperature. The crystallisation shrinkage observed from thermomechanical analysis (TMA) was lower after PA12 was exposed at a higher temperature. Judging from the crystal growth process of PA12 from in-situ optical microscope and phase field modelling, the crystals of PA12 exposed at a higher temperature were found to be smaller and more compact. The exposure to a high temperature allows PA12 to have lower melt viscosity, ensuring the material to sinter evenly, and this enhances better molecular interactions from polymer chains for the formation of crystals. |
| first_indexed | 2024-10-01T07:44:22Z |
| format | Journal Article |
| id | ntu-10356/170440 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:44:22Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1704402023-09-12T05:08:52Z Crystallisation behaviour of polyamide-12 during additive manufacturing process Teo, Benjamin How Wei Li, Weidong Chen, Kaijuan Zeng, Jun Du, Hejun School of Mechanical and Aerospace Engineering HP-NTU Digital Manufacturing Corporate Lab Engineering::Mechanical engineering Engineering::Materials Polyamide 12 Crystallisation Polyamide 12 (PA12) is a semi-crystalline polymer as its crystallisation behaviour varies due to manufacturing conditions. In this work, the crystallisation behaviour of PA12 was observed through experiments conducted at a constant cooling rate from different maximum heated temperatures. From the differential scanning calorimetry (DSC) experiment, PA12 exposed at a higher temperature crystallised at a lower temperature. The crystallisation shrinkage observed from thermomechanical analysis (TMA) was lower after PA12 was exposed at a higher temperature. Judging from the crystal growth process of PA12 from in-situ optical microscope and phase field modelling, the crystals of PA12 exposed at a higher temperature were found to be smaller and more compact. The exposure to a high temperature allows PA12 to have lower melt viscosity, ensuring the material to sinter evenly, and this enhances better molecular interactions from polymer chains for the formation of crystals. Nanyang Technological University This research work is conducted in collaboration with HP Inc. and supported by Nanyang Technological University and the Singapore Government through the Industry Alignment Fund – Industry Collaboration Projects Grant (I1801E0028). 2023-09-12T05:08:52Z 2023-09-12T05:08:52Z 2022 Journal Article Teo, B. H. W., Li, W., Chen, K., Zeng, J. & Du, H. (2022). Crystallisation behaviour of polyamide-12 during additive manufacturing process. Materials Today: Proceedings, 70, 184-187. https://dx.doi.org/10.1016/j.matpr.2022.09.018 2214-7853 https://hdl.handle.net/10356/170440 10.1016/j.matpr.2022.09.018 2-s2.0-85138016012 70 184 187 en I1801E0028 Materials Today: Proceedings © 2022 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Engineering::Materials Polyamide 12 Crystallisation Teo, Benjamin How Wei Li, Weidong Chen, Kaijuan Zeng, Jun Du, Hejun Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title | Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title_full | Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title_fullStr | Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title_full_unstemmed | Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title_short | Crystallisation behaviour of polyamide-12 during additive manufacturing process |
| title_sort | crystallisation behaviour of polyamide 12 during additive manufacturing process |
| topic | Engineering::Mechanical engineering Engineering::Materials Polyamide 12 Crystallisation |
| url | https://hdl.handle.net/10356/170440 |
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