High Glass Transition Materials from Sustainable Epoxy Resins with Potential Applications in the Aerospace and Space Sectors AITranslate

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DOI：https://doi.org/10.1021/acsapm.2c00183

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High glass transitions, high storage moduli, high thermal stability, and low water absorption values are crucial criteria of high-performant materials, though there is a challenge when we are confronting the bio-resourced materials with their performances. This work proposes the chemical combination of aromatic bio-based epoxy monomers with potential bio-based anhydrides to produce thermosetting materials with competitive performances. Triglycidyl ether of phloroglucinol (TGPh) and diglycidyl ether of vanillyl alcohol (DGEVA) were copolymerized with hexahydro-4-methylphthalic anhydride or methyl nadic anhydride. These copolymerization reactions start at low temperature, from 35 or 70 °C; that is a first advantage for an industrial up-scaling. The produced thermosets have high bio-based carbon content, ∼50–60%, high glass transition values (>100 °C for DGEVA-based resins and >200 °C for TGPh resins), high storage moduli (2.7–3.1 GPa at 30 °C), high thermal stability (T5% = 329–359 °C), and very low water absorption (in average ∼1.5% after 15 days). These performances of these bio-based thermosets open windows of application in space, aerospace, or naval industry.