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Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins

Lithography-based additive manufacturing was introduced in the 1980s, and is still the method of choice for printing accurate plastic parts with high surface quality. Recent progress in this field has made tough photopolymer resins and cheap LED light engines available. This study presents the influ...

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Detalles Bibliográficos
Autores principales: Steyrer, Bernhard, Neubauer, Philipp, Liska, Robert, Stampfl, Jürgen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5744380/
https://www.ncbi.nlm.nih.gov/pubmed/29257107
http://dx.doi.org/10.3390/ma10121445
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author Steyrer, Bernhard
Neubauer, Philipp
Liska, Robert
Stampfl, Jürgen
author_facet Steyrer, Bernhard
Neubauer, Philipp
Liska, Robert
Stampfl, Jürgen
author_sort Steyrer, Bernhard
collection PubMed
description Lithography-based additive manufacturing was introduced in the 1980s, and is still the method of choice for printing accurate plastic parts with high surface quality. Recent progress in this field has made tough photopolymer resins and cheap LED light engines available. This study presents the influence of photoinitiator selection and post-processing on the thermomechanical properties of various tough photopolymers. The influence of three photoinitiators (Ivocerin, BAPO, and TPO-L) on the double-bond conversion and mechanical properties was investigated by mid infrared spectroscopy, dynamic mechanical analysis and tensile tests. It was found that 1.18 wt % TPO-L would provide the best overall results in terms of double-bond conversion and mechanical properties. A correlation between double-bond conversion, yield strength, and glass transition temperature was found. Elongation at break remained high after post-curing at about 80–100%, and was not influenced by higher photoinitiator concentration. Finally, functional parts with 41 MPa tensile strength, 82% elongation at break, and 112 °C glass transition temperature were printed on a 405 nm DLP (digital light processing) printer.
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spelling pubmed-57443802017-12-31 Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins Steyrer, Bernhard Neubauer, Philipp Liska, Robert Stampfl, Jürgen Materials (Basel) Article Lithography-based additive manufacturing was introduced in the 1980s, and is still the method of choice for printing accurate plastic parts with high surface quality. Recent progress in this field has made tough photopolymer resins and cheap LED light engines available. This study presents the influence of photoinitiator selection and post-processing on the thermomechanical properties of various tough photopolymers. The influence of three photoinitiators (Ivocerin, BAPO, and TPO-L) on the double-bond conversion and mechanical properties was investigated by mid infrared spectroscopy, dynamic mechanical analysis and tensile tests. It was found that 1.18 wt % TPO-L would provide the best overall results in terms of double-bond conversion and mechanical properties. A correlation between double-bond conversion, yield strength, and glass transition temperature was found. Elongation at break remained high after post-curing at about 80–100%, and was not influenced by higher photoinitiator concentration. Finally, functional parts with 41 MPa tensile strength, 82% elongation at break, and 112 °C glass transition temperature were printed on a 405 nm DLP (digital light processing) printer. MDPI 2017-12-19 /pmc/articles/PMC5744380/ /pubmed/29257107 http://dx.doi.org/10.3390/ma10121445 Text en © 2017 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
Steyrer, Bernhard
Neubauer, Philipp
Liska, Robert
Stampfl, Jürgen
Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title_full Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title_fullStr Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title_full_unstemmed Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title_short Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
title_sort visible light photoinitiator for 3d-printing of tough methacrylate resins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5744380/
https://www.ncbi.nlm.nih.gov/pubmed/29257107
http://dx.doi.org/10.3390/ma10121445
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