Vanillin-Based Epoxy Vitrimers: Looking at the Cystamine Hardener from a Different Perspective.
Journal
ACS sustainable chemistry & engineering
ISSN: 2168-0485
Titre abrégé: ACS Sustain Chem Eng
Pays: United States
ID NLM: 101608852
Informations de publication
Date de publication:
17 Apr 2023
17 Apr 2023
Historique:
received:
18
01
2023
revised:
16
03
2023
medline:
24
4
2023
pubmed:
24
4
2023
entrez:
24
04
2023
Statut:
epublish
Résumé
Epoxy vitrimers encompass many advantages compared to traditional epoxy materials such as recyclability, repairability, and reprocessability. These properties are induced by the incorporation of dynamic reversible covalent bonds. Recently, the incorporation of aromatic disulfide bridges that are dynamic has expanded the development of new eco-friendly epoxy materials. Herein, we studied a bio-based aliphatic disulfide based on cystamine as a hardener with a vanillin-derived bio-sourced epoxy to prepare fully bio-based epoxy vitrimers. This article provides a comparative study between cystamine and an aromatic disulfide benchmark hardener issued from petrol resources. This work demonstrated that the presence of this aliphatic hardener has a significant influence not only on the reactivity, but most importantly on the resulting dynamic properties. An interesting yet counterintuitive accelerating effect of the dynamic exchanges was clearly demonstrated with only 2 to 20% of molar fraction of cystamine added to the aromatic disulfide formulation. A similar glass transition was obtained compared to the purely aromatic analogue, but relaxation times were decreased by an order of magnitude.
Identifiants
pubmed: 37091125
doi: 10.1021/acssuschemeng.3c00379
pmc: PMC10114092
doi:
Types de publication
Journal Article
Langues
eng
Pagination
6021-6031Informations de copyright
© 2023 The Authors. Published by American Chemical Society.
Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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