Cargando…
A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers
Flow induced crystallization of semi-crystalline polymers is an important issue in polymer science and engineering because the changes in morphology strongly affect the properties of polymer materials. In this study, a phase field technique considering polymer characteristics was established for mod...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431983/ https://www.ncbi.nlm.nih.gov/pubmed/30979323 http://dx.doi.org/10.3390/polym8060230 |
_version_ | 1783406030959411200 |
---|---|
author | Wang, Xiaodong Ouyang, Jie Zhou, Wen Liu, Zhijun |
author_facet | Wang, Xiaodong Ouyang, Jie Zhou, Wen Liu, Zhijun |
author_sort | Wang, Xiaodong |
collection | PubMed |
description | Flow induced crystallization of semi-crystalline polymers is an important issue in polymer science and engineering because the changes in morphology strongly affect the properties of polymer materials. In this study, a phase field technique considering polymer characteristics was established for modeling and predicting the resulting morphologies. The considered crystallization process can be divided into two stages, which are nucleation upon the flow induced structures and subsequent crystal growth after the cessation of flow. Accordingly, the proposed technique consists of two parts which are a flow induced nucleation model based on the calculated information of molecular orientation and stretch, and a phase field crystal growth model upon the oriented nuclei. Two-dimensional simulations are carried out to predict the crystallization morphology of isotactic polystyrene under an injection molding process. The results of these simulations demonstrate that flow affects crystallization morphology mainly by producing oriented nuclei. Specifically, the typical skin-core structures along the thickness direction can be successfully predicted. More importantly, the results reveal that flow plays a dominant part in generating oriented crystal morphologies compared to other parameters, such as anisotropy strength, crystallization temperature, and physical noise. |
format | Online Article Text |
id | pubmed-6431983 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64319832019-04-02 A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers Wang, Xiaodong Ouyang, Jie Zhou, Wen Liu, Zhijun Polymers (Basel) Article Flow induced crystallization of semi-crystalline polymers is an important issue in polymer science and engineering because the changes in morphology strongly affect the properties of polymer materials. In this study, a phase field technique considering polymer characteristics was established for modeling and predicting the resulting morphologies. The considered crystallization process can be divided into two stages, which are nucleation upon the flow induced structures and subsequent crystal growth after the cessation of flow. Accordingly, the proposed technique consists of two parts which are a flow induced nucleation model based on the calculated information of molecular orientation and stretch, and a phase field crystal growth model upon the oriented nuclei. Two-dimensional simulations are carried out to predict the crystallization morphology of isotactic polystyrene under an injection molding process. The results of these simulations demonstrate that flow affects crystallization morphology mainly by producing oriented nuclei. Specifically, the typical skin-core structures along the thickness direction can be successfully predicted. More importantly, the results reveal that flow plays a dominant part in generating oriented crystal morphologies compared to other parameters, such as anisotropy strength, crystallization temperature, and physical noise. MDPI 2016-06-08 /pmc/articles/PMC6431983/ /pubmed/30979323 http://dx.doi.org/10.3390/polym8060230 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Xiaodong Ouyang, Jie Zhou, Wen Liu, Zhijun A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title | A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title_full | A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title_fullStr | A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title_full_unstemmed | A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title_short | A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers |
title_sort | phase field technique for modeling and predicting flow induced crystallization morphology of semi-crystalline polymers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431983/ https://www.ncbi.nlm.nih.gov/pubmed/30979323 http://dx.doi.org/10.3390/polym8060230 |
work_keys_str_mv | AT wangxiaodong aphasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT ouyangjie aphasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT zhouwen aphasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT liuzhijun aphasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT wangxiaodong phasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT ouyangjie phasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT zhouwen phasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers AT liuzhijun phasefieldtechniqueformodelingandpredictingflowinducedcrystallizationmorphologyofsemicrystallinepolymers |