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Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate

The quantitative study of the structure and properties relationship in cellular materials is mostly limited to cell diameter, cell density, skin layer thickness, and cell size distribution. In addition, the investigation of the morphology is generally carried out in two dimensions. Therefore, the in...

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Autores principales: Güzel, Kübra, Zarges, Jan-Christoph, Heim, Hans-Peter
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144126/
https://www.ncbi.nlm.nih.gov/pubmed/35629661
http://dx.doi.org/10.3390/ma15103634
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author Güzel, Kübra
Zarges, Jan-Christoph
Heim, Hans-Peter
author_facet Güzel, Kübra
Zarges, Jan-Christoph
Heim, Hans-Peter
author_sort Güzel, Kübra
collection PubMed
description The quantitative study of the structure and properties relationship in cellular materials is mostly limited to cell diameter, cell density, skin layer thickness, and cell size distribution. In addition, the investigation of the morphology is generally carried out in two dimensions. Therefore, the interrelation between morphological properties and mechanical characteristics of the foam structure has remained in an uncertain state. In this study, during the physical foaming process, a foam morphology is locally created by using a mold equipped with a core-back insert. The variation in morphology is obtained by modifying the mold temperature, injection flow rate, and blowing agent content in the polymer melt. X-ray microtomography (μCT) is used to acquire the 3D visualization of the cells structure. The Cell Distribution Index (CDI) is calculated to represent the polydispersity in cell size distribution. The relationship between the wide range of morphological qualities and relevant flexural properties is made explicit via a statistical model. According to the results, the morphology, particularly cell shape, characterizes the mechanism of the linear elastic deformation of the closed-cell foams. IR-thermography reveals the bending failure of cellular structures in the tensile region despite the differences in cell diameter.
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spelling pubmed-91441262022-05-29 Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate Güzel, Kübra Zarges, Jan-Christoph Heim, Hans-Peter Materials (Basel) Article The quantitative study of the structure and properties relationship in cellular materials is mostly limited to cell diameter, cell density, skin layer thickness, and cell size distribution. In addition, the investigation of the morphology is generally carried out in two dimensions. Therefore, the interrelation between morphological properties and mechanical characteristics of the foam structure has remained in an uncertain state. In this study, during the physical foaming process, a foam morphology is locally created by using a mold equipped with a core-back insert. The variation in morphology is obtained by modifying the mold temperature, injection flow rate, and blowing agent content in the polymer melt. X-ray microtomography (μCT) is used to acquire the 3D visualization of the cells structure. The Cell Distribution Index (CDI) is calculated to represent the polydispersity in cell size distribution. The relationship between the wide range of morphological qualities and relevant flexural properties is made explicit via a statistical model. According to the results, the morphology, particularly cell shape, characterizes the mechanism of the linear elastic deformation of the closed-cell foams. IR-thermography reveals the bending failure of cellular structures in the tensile region despite the differences in cell diameter. MDPI 2022-05-19 /pmc/articles/PMC9144126/ /pubmed/35629661 http://dx.doi.org/10.3390/ma15103634 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Güzel, Kübra
Zarges, Jan-Christoph
Heim, Hans-Peter
Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title_full Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title_fullStr Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title_full_unstemmed Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title_short Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
title_sort effect of cell morphology on flexural behavior of injection-molded microcellular polycarbonate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144126/
https://www.ncbi.nlm.nih.gov/pubmed/35629661
http://dx.doi.org/10.3390/ma15103634
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