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- W4384198747 abstract "The goal of this work is to develop carbon fiber-reinforced polymer (CFRP) composites showing vitrimer properties and manufacturable by the prepreg technique. Since their invention in 2011, epoxy vitrimer matrices have shown an appealing potential to produce CFRPs with healing, adhesion, and recycling abilities. While techniques such as resin infusion or resin transfer molding have been successfully applied, production of composites by handling of preimpregnated sheets requires a specific set of properties which is still lacking. Starting from commercially available monomers, we hereby investigate the design and preparation of a thermolatent reactive composition compliant with the prepreg technique. The designed composition is heterogeneous, comprising a crystalline hardener dispersed in novolac-based epoxy resin. It thus offers (i) latency and the required viscosity profile for impregnation of carbon fibers around 100 °C, (ii) chemical inertness and tackiness for storage and handling at room temperature, and (iii) awakened reactivity for curing at higher temperatures (>130 °C). The whole CFRP composite manufacture (from resin mixing, impregnation, and composite curing) was transferred from the laboratory to an industrial environment. The resulting CFRP vitrimer composites are investigated with regard to their mechanical properties, interfacial welding, damage healing, and reprocessing through chemical depolymerization, allowing the recovery of carbon fiber sheets with limited damage." @default.
- W4384198747 created "2023-07-14" @default.
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- W4384198747 date "2023-07-13" @default.
- W4384198747 modified "2023-09-27" @default.
- W4384198747 title "Thermolatent Heterogeneous Epoxy–Acid Formulation for the Manufacture of Preimpregnated Sheets and Composites with Vitrimer Properties" @default.
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- W4384198747 doi "https://doi.org/10.1021/acsapm.3c00778" @default.
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