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“Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation
“Skin-core-skin” structure is a typical crystal morphology in injection products. Previous numerical works have rarely focused on crystal evolution; rather, they have mostly been based on the prediction of temperature distribution or crystallization kinetics. The aim of this work was to achieve the...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951494/ https://www.ncbi.nlm.nih.gov/pubmed/29659516 http://dx.doi.org/10.3390/ma11040610 |
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author | Ruan, Chunlei |
author_facet | Ruan, Chunlei |
author_sort | Ruan, Chunlei |
collection | PubMed |
description | “Skin-core-skin” structure is a typical crystal morphology in injection products. Previous numerical works have rarely focused on crystal evolution; rather, they have mostly been based on the prediction of temperature distribution or crystallization kinetics. The aim of this work was to achieve the “skin-core-skin” structure and investigate the role of external flow and temperature fields on crystal morphology. Therefore, the multiscale algorithm was extended to the simulation of polymer crystallization in a pipe flow. The multiscale algorithm contains two parts: a collocated finite volume method at the macroscopic level and a morphological Monte Carlo method at the microscopic level. The SIMPLE (semi-implicit method for pressure linked equations) algorithm was used to calculate the polymeric model at the macroscopic level, while the Monte Carlo method with stochastic birth-growth process of spherulites and shish-kebabs was used at the microscopic level. Results show that our algorithm is valid to predict “skin-core-skin” structure, and the initial melt temperature and the maximum velocity of melt at the inlet mainly affects the morphology of shish-kebabs. |
format | Online Article Text |
id | pubmed-5951494 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-59514942018-05-15 “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation Ruan, Chunlei Materials (Basel) Article “Skin-core-skin” structure is a typical crystal morphology in injection products. Previous numerical works have rarely focused on crystal evolution; rather, they have mostly been based on the prediction of temperature distribution or crystallization kinetics. The aim of this work was to achieve the “skin-core-skin” structure and investigate the role of external flow and temperature fields on crystal morphology. Therefore, the multiscale algorithm was extended to the simulation of polymer crystallization in a pipe flow. The multiscale algorithm contains two parts: a collocated finite volume method at the macroscopic level and a morphological Monte Carlo method at the microscopic level. The SIMPLE (semi-implicit method for pressure linked equations) algorithm was used to calculate the polymeric model at the macroscopic level, while the Monte Carlo method with stochastic birth-growth process of spherulites and shish-kebabs was used at the microscopic level. Results show that our algorithm is valid to predict “skin-core-skin” structure, and the initial melt temperature and the maximum velocity of melt at the inlet mainly affects the morphology of shish-kebabs. MDPI 2018-04-16 /pmc/articles/PMC5951494/ /pubmed/29659516 http://dx.doi.org/10.3390/ma11040610 Text en © 2018 by the author. 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 Ruan, Chunlei “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title | “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title_full | “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title_fullStr | “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title_full_unstemmed | “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title_short | “Skin-Core-Skin” Structure of Polymer Crystallization Investigated by Multiscale Simulation |
title_sort | “skin-core-skin” structure of polymer crystallization investigated by multiscale simulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951494/ https://www.ncbi.nlm.nih.gov/pubmed/29659516 http://dx.doi.org/10.3390/ma11040610 |
work_keys_str_mv | AT ruanchunlei skincoreskinstructureofpolymercrystallizationinvestigatedbymultiscalesimulation |