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Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing
The aim of this work was the development of a thermoplastic/thermosetting combined system with a novel production technique. A poly(caprolactone) (PCL) structure has been designed and produced by fused filament fabrication, and impregnated with an epoxy matrix. The mechanical properties, fracture to...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078803/ https://www.ncbi.nlm.nih.gov/pubmed/32054094 http://dx.doi.org/10.3390/ma13040819 |
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author | Dorigato, Andrea Rigotti, Daniele Pegoretti, Alessandro |
author_facet | Dorigato, Andrea Rigotti, Daniele Pegoretti, Alessandro |
author_sort | Dorigato, Andrea |
collection | PubMed |
description | The aim of this work was the development of a thermoplastic/thermosetting combined system with a novel production technique. A poly(caprolactone) (PCL) structure has been designed and produced by fused filament fabrication, and impregnated with an epoxy matrix. The mechanical properties, fracture toughness, and thermal healing capacities of this blend (EP-PCL(3D)) were compared with those of a conventional melt mixed poly(caprolactone)/epoxy blend (EP-PCL). The fine dispersion of the PCL domains within the epoxy in the EP-PCL samples was responsible of a noticeable toughening effect, while in the EP-PCL(3D) structure the two phases showed an independent behavior, and fracture propagation in the epoxy was followed by the progressive yielding of the PCL domains. This peculiar behavior of EP-PCL(3D) system allowed the PCL phase to express its full potential as energy absorber under impact conditions. Optical microscope images on the fracture surfaces of the EP-PCL(3D) samples revealed that during fracture toughness tests the crack mainly propagated within the epoxy phase, while PCL contributed to energy absorption through plastic deformation. Due to the selected PCL concentration in the blends (35 vol %) and to the discrepancy between the mechanical properties of the constituents, the healing efficiency values of the two systems were rather limited. |
format | Online Article Text |
id | pubmed-7078803 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70788032020-04-21 Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing Dorigato, Andrea Rigotti, Daniele Pegoretti, Alessandro Materials (Basel) Article The aim of this work was the development of a thermoplastic/thermosetting combined system with a novel production technique. A poly(caprolactone) (PCL) structure has been designed and produced by fused filament fabrication, and impregnated with an epoxy matrix. The mechanical properties, fracture toughness, and thermal healing capacities of this blend (EP-PCL(3D)) were compared with those of a conventional melt mixed poly(caprolactone)/epoxy blend (EP-PCL). The fine dispersion of the PCL domains within the epoxy in the EP-PCL samples was responsible of a noticeable toughening effect, while in the EP-PCL(3D) structure the two phases showed an independent behavior, and fracture propagation in the epoxy was followed by the progressive yielding of the PCL domains. This peculiar behavior of EP-PCL(3D) system allowed the PCL phase to express its full potential as energy absorber under impact conditions. Optical microscope images on the fracture surfaces of the EP-PCL(3D) samples revealed that during fracture toughness tests the crack mainly propagated within the epoxy phase, while PCL contributed to energy absorption through plastic deformation. Due to the selected PCL concentration in the blends (35 vol %) and to the discrepancy between the mechanical properties of the constituents, the healing efficiency values of the two systems were rather limited. MDPI 2020-02-11 /pmc/articles/PMC7078803/ /pubmed/32054094 http://dx.doi.org/10.3390/ma13040819 Text en © 2020 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 Dorigato, Andrea Rigotti, Daniele Pegoretti, Alessandro Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title | Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title_full | Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title_fullStr | Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title_full_unstemmed | Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title_short | Novel Poly(Caprolactone)/Epoxy Blends by Additive Manufacturing |
title_sort | novel poly(caprolactone)/epoxy blends by additive manufacturing |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7078803/ https://www.ncbi.nlm.nih.gov/pubmed/32054094 http://dx.doi.org/10.3390/ma13040819 |
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