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Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers

In outdoor environments, the action of the Sun through its ultraviolet radiation has a degrading effect on most materials, with polymers being among those affected. In the past few years, 3D printing has seen an increased usage in fabricating parts for functional applications, including parts destin...

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Autores principales: Amza, Catalin Gheorghe, Zapciu, Aurelian, Baciu, Florin, Vasile, Mihai Ion, Nicoara, Adrian Ionut
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8659210/
https://www.ncbi.nlm.nih.gov/pubmed/34883635
http://dx.doi.org/10.3390/polym13234132
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author Amza, Catalin Gheorghe
Zapciu, Aurelian
Baciu, Florin
Vasile, Mihai Ion
Nicoara, Adrian Ionut
author_facet Amza, Catalin Gheorghe
Zapciu, Aurelian
Baciu, Florin
Vasile, Mihai Ion
Nicoara, Adrian Ionut
author_sort Amza, Catalin Gheorghe
collection PubMed
description In outdoor environments, the action of the Sun through its ultraviolet radiation has a degrading effect on most materials, with polymers being among those affected. In the past few years, 3D printing has seen an increased usage in fabricating parts for functional applications, including parts destined for outdoor use. This paper analyzes the effect of accelerated aging through prolonged exposure to UV-B on the mechanical properties of parts 3D printed from the commonly used polymers polylactic acid (PLA) and polyethylene terephthalate–glycol (PETG). Samples 3D printed from these materials went through a dry 24 h UV-B exposure aging treatment and were then tested against a control group for changes in mechanical properties. Both the tensile and compressive strengths were determined, as well as changes in material creep characteristics. After irradiation, PLA and PETG parts saw significant decreases in both tensile strength (PLA: −5.3%; PETG: −36%) and compression strength (PLA: −6.3%; PETG: −38.3%). Part stiffness did not change significantly following the UV-B exposure and creep behavior was closely connected to the decrease in mechanical properties. A scanning electron microscopy (SEM) fractographic analysis was carried out to better understand the failure mechanism and material structural changes in tensile loaded, accelerated aged parts.
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spelling pubmed-86592102021-12-10 Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers Amza, Catalin Gheorghe Zapciu, Aurelian Baciu, Florin Vasile, Mihai Ion Nicoara, Adrian Ionut Polymers (Basel) Article In outdoor environments, the action of the Sun through its ultraviolet radiation has a degrading effect on most materials, with polymers being among those affected. In the past few years, 3D printing has seen an increased usage in fabricating parts for functional applications, including parts destined for outdoor use. This paper analyzes the effect of accelerated aging through prolonged exposure to UV-B on the mechanical properties of parts 3D printed from the commonly used polymers polylactic acid (PLA) and polyethylene terephthalate–glycol (PETG). Samples 3D printed from these materials went through a dry 24 h UV-B exposure aging treatment and were then tested against a control group for changes in mechanical properties. Both the tensile and compressive strengths were determined, as well as changes in material creep characteristics. After irradiation, PLA and PETG parts saw significant decreases in both tensile strength (PLA: −5.3%; PETG: −36%) and compression strength (PLA: −6.3%; PETG: −38.3%). Part stiffness did not change significantly following the UV-B exposure and creep behavior was closely connected to the decrease in mechanical properties. A scanning electron microscopy (SEM) fractographic analysis was carried out to better understand the failure mechanism and material structural changes in tensile loaded, accelerated aged parts. MDPI 2021-11-26 /pmc/articles/PMC8659210/ /pubmed/34883635 http://dx.doi.org/10.3390/polym13234132 Text en © 2021 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
Amza, Catalin Gheorghe
Zapciu, Aurelian
Baciu, Florin
Vasile, Mihai Ion
Nicoara, Adrian Ionut
Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title_full Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title_fullStr Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title_full_unstemmed Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title_short Accelerated Aging Effect on Mechanical Properties of Common 3D-Printing Polymers
title_sort accelerated aging effect on mechanical properties of common 3d-printing polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8659210/
https://www.ncbi.nlm.nih.gov/pubmed/34883635
http://dx.doi.org/10.3390/polym13234132
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