Strategies towards Fully Recyclable Commercial Epoxy Resins: Diels–Alder Structures in Sustainable Composites

Vidal, Julio ; Hornero, Carlos ; De la Flor, Silvia ; Vilanova, Anna ; Dieste, Jose Antonio (Universidad de Zaragoza) ; Castell, Pere

Resumen: The Diels–Alder equilibrium is a widely known process in chemistry that can be used to provide a thermoset structure with recyclability and reprocessability mechanisms. In this study, a commercial epoxy resin is modified through the integration of functional groups into the network structure to provide superior performance. The present study has demonstrated that it is possible to adapt the curing process to efficiently incorporate these moieties in the final structure of commercial epoxy-based resins. It also evaluates the impact that they have on the final properties of the cured composites. In addition, different approaches have been studied for the incorporation of the functional group, adjusting and adapting the stoichiometry of the system components due to the differences in reactivity caused by the presence of the incorporated reactive groups, with the objective of maintaining comparable ratios of epoxy/amine groups in the formulation. Finally, it has been demonstrated that although the Diels–Alder equilibrium responds under external conditions, such as temperature, different sets of parameters and behaviors are to be expected as the structures are integrated into the thermoset, generating new equilibrium temperatures. In this way, the present research has explored sustainable strategies to enable the recyclability of commercial thermoset systems through crosslinking control and its modification.

Idioma: Inglés

DOI: 10.3390/polym16081024

Año: 2024

Publicado en: Polymers 16, 8 (2024), 1024 [17 pp.]
ISSN: 2073-4360

Factor impacto JCR: 4.9 (2024)

Categ. JCR: POLYMER SCIENCE rank: 19 / 94 = 0.202 (2024) - Q1 - T1

Factor impacto SCIMAGO: 0.918 - Polymers and Plastics (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/EC/H2020/101023190/EU/Improving recyclability of thermoset composite materials through a greener recycling technology based on reversible biobased bonding materials

Tipo y forma: Article (Published version)

Área (Departamento): Área Ing. Procesos Fabricación (Dpto. Ingeniería Diseño Fabri.)