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Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer
Welding via bond exchange reactions has provided advances in obtaining high-quality joining performance. However, the reported welding method requires a relatively high press force, and challenges are still encountered in welding hard vitrimer. In this work, a facile surface depolymerization strateg...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267785/ https://www.ncbi.nlm.nih.gov/pubmed/35806612 http://dx.doi.org/10.3390/ma15134488 |
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author | An, Le Zhao, Wenzhe |
author_facet | An, Le Zhao, Wenzhe |
author_sort | An, Le |
collection | PubMed |
description | Welding via bond exchange reactions has provided advances in obtaining high-quality joining performance. However, the reported welding method requires a relatively high press force, and challenges are still encountered in welding hard vitrimer. In this work, a facile surface depolymerization strategy was introduced to weld high-performance epoxy vitrimer. The vitrimers were firstly dissolved into ethylene glycol for depolymerization based on the solvent-assisted bond exchange reactions. Then, the depolymerized vitrimers were welded under heat and press force. The effect of the depolymerizing time, welding pressure, welding temperature and welding time on the welding strength were further investigated. It was found that there were optimal values for the depolymerizing time, welding pressure, and welding temperature, respectively, for the welding strength, while the welding strength increased with increasing welding time. Through facile surface degradation, the welding pressure was highly reduced, while the welding strength was increased. With surface depolymerization, the welding strength was 1.55-times higher, but the magnitude of press force was 1/1000-times than that with no surface depolymerization. It is elucidative that surface depolymerization can be used to weld hard vitrimer composites alongside reducing the press force effectively. |
format | Online Article Text |
id | pubmed-9267785 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92677852022-07-09 Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer An, Le Zhao, Wenzhe Materials (Basel) Article Welding via bond exchange reactions has provided advances in obtaining high-quality joining performance. However, the reported welding method requires a relatively high press force, and challenges are still encountered in welding hard vitrimer. In this work, a facile surface depolymerization strategy was introduced to weld high-performance epoxy vitrimer. The vitrimers were firstly dissolved into ethylene glycol for depolymerization based on the solvent-assisted bond exchange reactions. Then, the depolymerized vitrimers were welded under heat and press force. The effect of the depolymerizing time, welding pressure, welding temperature and welding time on the welding strength were further investigated. It was found that there were optimal values for the depolymerizing time, welding pressure, and welding temperature, respectively, for the welding strength, while the welding strength increased with increasing welding time. Through facile surface degradation, the welding pressure was highly reduced, while the welding strength was increased. With surface depolymerization, the welding strength was 1.55-times higher, but the magnitude of press force was 1/1000-times than that with no surface depolymerization. It is elucidative that surface depolymerization can be used to weld hard vitrimer composites alongside reducing the press force effectively. MDPI 2022-06-25 /pmc/articles/PMC9267785/ /pubmed/35806612 http://dx.doi.org/10.3390/ma15134488 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 An, Le Zhao, Wenzhe Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title | Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title_full | Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title_fullStr | Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title_full_unstemmed | Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title_short | Facile Surface Depolymerization Promotes the Welding of Hard Epoxy Vitrimer |
title_sort | facile surface depolymerization promotes the welding of hard epoxy vitrimer |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267785/ https://www.ncbi.nlm.nih.gov/pubmed/35806612 http://dx.doi.org/10.3390/ma15134488 |
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