Epoxy Vitrimers are gathering attention as a development in the field of more easily re-processable and self-healing thermosets. The incorporation of a catalyst should activate the transesterification reaction within the polymeric macromolecule inducing topological modification of the network. By reacting epoxy precursors with suitable anhydrides and acids will promote exchange reactions between esters and beta-hydroxyls adding the vitrimeric behaviour. In the present work, a commercial epoxy system suitable for CFRP manufacturing has been modified to induce vitrimeric behaviour by exploiting the catalytic activity towards the transesterification reaction of Zn2+. Creep experiments confirm that the resin starts to flow above a critical “Vitrimeric” temperature (Tv).

ENABLING REPAIRABILITY AND REUSE OF EPOXY COMPOSITES: EPOXY VITRIMERS

Palmieri B.;Amendola E.;Martone A.;Giordano M.
2022

Abstract

Epoxy Vitrimers are gathering attention as a development in the field of more easily re-processable and self-healing thermosets. The incorporation of a catalyst should activate the transesterification reaction within the polymeric macromolecule inducing topological modification of the network. By reacting epoxy precursors with suitable anhydrides and acids will promote exchange reactions between esters and beta-hydroxyls adding the vitrimeric behaviour. In the present work, a commercial epoxy system suitable for CFRP manufacturing has been modified to induce vitrimeric behaviour by exploiting the catalytic activity towards the transesterification reaction of Zn2+. Creep experiments confirm that the resin starts to flow above a critical “Vitrimeric” temperature (Tv).
2022
Istituto per i Polimeri, Compositi e Biomateriali - IPCB - Sede Secondaria di Napoli (Portici)
Covalent Adaptable Networks
Epoxy resin
Self-healing
Thermoset recycling
Vitrimers
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/525282
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