Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances

With the advances in new materials, equipment, and processes, additive manufacturing (AM) has gained increased importance for producing the final parts that are used in several industrial areas, such as automotive, aeronautics, and health. The constant development of 3D-printing equipment allows for...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ana C. Pinho, Ana P. Piedade
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	additive manufacturing multi-material sandwich structures artificial saliva mechanical properties oral devices Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/209a1e99378943a0a635d4ce8a4d33ec
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:209a1e99378943a0a635d4ce8a4d33ec
record_format	dspace
spelling	oai:doaj.org-article:209a1e99378943a0a635d4ce8a4d33ec2021-11-25T18:49:32ZSandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances10.3390/polym132240302073-4360https://doaj.org/article/209a1e99378943a0a635d4ce8a4d33ec2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4030https://doaj.org/toc/2073-4360With the advances in new materials, equipment, and processes, additive manufacturing (AM) has gained increased importance for producing the final parts that are used in several industrial areas, such as automotive, aeronautics, and health. The constant development of 3D-printing equipment allows for printing multi-material systems as sandwich specimens using, for example, double-nozzle configurations. The present study aimed to compare the mechanical behavior of multi-material specimens that were produced using a double-nozzle 3D printer. The materials that were included in this study were the copolymer acrylonitrile-butadiene-styrene (ABS), high-impact polystyrene (HIPS), poly(methyl methacrylate) (PMMA), and thermoplastic polyurethane (TPU). The configuration of the sandwich structures consisted of a core of TPU and the outer skins made of one of the other three materials. The mechanical behavior was evaluated through three-point bending (3PB) and transverse impact tests and compared with mono-material printed specimens. The effect of aging in artificial saliva was evaluated for all the processed materials. The main conclusion of this study was that the aging process did not significantly alter the mechanical properties for mono-materials, except for PMMA, where the maximum flexural stress decreased. In the sandwich structures, the TPU core had a softening effect, inducing a significant increase in the resilience and resistance to transverse impact. The obtained results are quite promising for applications in biomedical devices, such as protective mouthguards or teeth aligners. In these specific applications, the changes in the mechanical properties with time and with the contact of saliva assume particular importance.Ana C. PinhoAna P. PiedadeMDPI AGarticleadditive manufacturingmulti-materialsandwich structuresartificial salivamechanical propertiesoral devicesOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4030, p 4030 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	additive manufacturing multi-material sandwich structures artificial saliva mechanical properties oral devices Organic chemistry QD241-441
spellingShingle	additive manufacturing multi-material sandwich structures artificial saliva mechanical properties oral devices Organic chemistry QD241-441 Ana C. Pinho Ana P. Piedade Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
description	With the advances in new materials, equipment, and processes, additive manufacturing (AM) has gained increased importance for producing the final parts that are used in several industrial areas, such as automotive, aeronautics, and health. The constant development of 3D-printing equipment allows for printing multi-material systems as sandwich specimens using, for example, double-nozzle configurations. The present study aimed to compare the mechanical behavior of multi-material specimens that were produced using a double-nozzle 3D printer. The materials that were included in this study were the copolymer acrylonitrile-butadiene-styrene (ABS), high-impact polystyrene (HIPS), poly(methyl methacrylate) (PMMA), and thermoplastic polyurethane (TPU). The configuration of the sandwich structures consisted of a core of TPU and the outer skins made of one of the other three materials. The mechanical behavior was evaluated through three-point bending (3PB) and transverse impact tests and compared with mono-material printed specimens. The effect of aging in artificial saliva was evaluated for all the processed materials. The main conclusion of this study was that the aging process did not significantly alter the mechanical properties for mono-materials, except for PMMA, where the maximum flexural stress decreased. In the sandwich structures, the TPU core had a softening effect, inducing a significant increase in the resilience and resistance to transverse impact. The obtained results are quite promising for applications in biomedical devices, such as protective mouthguards or teeth aligners. In these specific applications, the changes in the mechanical properties with time and with the contact of saliva assume particular importance.
format	article
author	Ana C. Pinho Ana P. Piedade
author_facet	Ana C. Pinho Ana P. Piedade
author_sort	Ana C. Pinho
title	Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
title_short	Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
title_full	Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
title_fullStr	Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
title_full_unstemmed	Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances
title_sort	sandwich multi-material 3d-printed polymers: influence of aging on the impact and flexure resistances
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/209a1e99378943a0a635d4ce8a4d33ec
work_keys_str_mv	AT anacpinho sandwichmultimaterial3dprintedpolymersinfluenceofagingontheimpactandflexureresistances AT anappiedade sandwichmultimaterial3dprintedpolymersinfluenceofagingontheimpactandflexureresistances
_version_	1718410636282560512

Sandwich Multi-Material 3D-Printed Polymers: Influence of Aging on the Impact and Flexure Resistances

Ejemplares similares