Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation
Bubble growth in the polymer extrusion foaming process occurs under a dynamic melt flow. For non-Newtonian fluids, this work successfully coupled the dynamic melt flow simulation with the bubble growth model to realize bubble growth predictions in an extrusion flow. The initial thermophysical proper...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/16/2799 |
| _version_ | 1797522237375381504 |
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| author | Shun Yao Yichong Chen Yijie Ling Dongdong Hu Zhenhao Xi Ling Zhao |
| author_facet | Shun Yao Yichong Chen Yijie Ling Dongdong Hu Zhenhao Xi Ling Zhao |
| author_sort | Shun Yao |
| collection | DOAJ |
| description | Bubble growth in the polymer extrusion foaming process occurs under a dynamic melt flow. For non-Newtonian fluids, this work successfully coupled the dynamic melt flow simulation with the bubble growth model to realize bubble growth predictions in an extrusion flow. The initial thermophysical properties and dynamic rheological property distribution at the cross section of the die exit were calculated based on the finite element method. It was found that dynamic rheological properties provided a necessary solution for predicting bubble growth during the supercritical CO<sub>2</sub> polyethylene terephthalate (PET) extrusion foaming process. The introduction of initial melt stress could effectively inhibit the rapid growth of bubbles and reduce the stable size of bubbles. However, the initial melt stress was ignored in previous work involving bubble growth predictions because it was not available. The simulation results based on the above theoretical model were consistent with the evolution trends of cell morphology and agreed well with the actual experimental results. |
| first_indexed | 2024-03-10T08:26:33Z |
| format | Article |
| id | doaj.art-97b47e8905e14e0fab1b1fb8adbe5482 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:26:33Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-97b47e8905e14e0fab1b1fb8adbe54822023-11-22T09:24:36ZengMDPI AGPolymers2073-43602021-08-011316279910.3390/polym13162799Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow SimulationShun Yao0Yichong Chen1Yijie Ling2Dongdong Hu3Zhenhao Xi4Ling Zhao5Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaShanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaShanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaShanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaShanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaShanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, ChinaBubble growth in the polymer extrusion foaming process occurs under a dynamic melt flow. For non-Newtonian fluids, this work successfully coupled the dynamic melt flow simulation with the bubble growth model to realize bubble growth predictions in an extrusion flow. The initial thermophysical properties and dynamic rheological property distribution at the cross section of the die exit were calculated based on the finite element method. It was found that dynamic rheological properties provided a necessary solution for predicting bubble growth during the supercritical CO<sub>2</sub> polyethylene terephthalate (PET) extrusion foaming process. The introduction of initial melt stress could effectively inhibit the rapid growth of bubbles and reduce the stable size of bubbles. However, the initial melt stress was ignored in previous work involving bubble growth predictions because it was not available. The simulation results based on the above theoretical model were consistent with the evolution trends of cell morphology and agreed well with the actual experimental results.https://www.mdpi.com/2073-4360/13/16/2799supercritical CO<sub>2</sub>PET extrusion foaming processbubble growthdynamic melt flow |
| spellingShingle | Shun Yao Yichong Chen Yijie Ling Dongdong Hu Zhenhao Xi Ling Zhao Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation Polymers supercritical CO<sub>2</sub> PET extrusion foaming process bubble growth dynamic melt flow |
| title | Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation |
| title_full | Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation |
| title_fullStr | Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation |
| title_full_unstemmed | Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation |
| title_short | Analysis of Bubble Growth in Supercritical CO<sub>2</sub> Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation |
| title_sort | analysis of bubble growth in supercritical co sub 2 sub extrusion foaming polyethylene terephthalate process based on dynamic flow simulation |
| topic | supercritical CO<sub>2</sub> PET extrusion foaming process bubble growth dynamic melt flow |
| url | https://www.mdpi.com/2073-4360/13/16/2799 |
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