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New Epoxy Thermosets Derived from Clove Oil Prepared by Epoxy-Amine Curing
Open AccessArticle

New Eco-Friendly Synthesized Thermosets from Isoeugenol-Based Epoxy Resins

1
ICMUB Institute, Université de Bourgogne Franche-Comté, UMR 6302 CNRS-UB, F-21000 Dijon, France
2
FEMTO-ST Institute, Université de Bourgogne Franche-Comté, UMR 6174 CNRS-UFC-ENSMM-UTBM, Department of Applied Mechanics, F-25000 Besancon, France
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(1), 229; https://doi.org/10.3390/polym12010229
Received: 19 December 2019 / Revised: 10 January 2020 / Accepted: 15 January 2020 / Published: 17 January 2020
(This article belongs to the Special Issue Thermosets II)
Epoxy resin plays a key role in composite matrices and DGEBA is the major precursor used. With the aim of favouring the use of bio resources, epoxy resins can be prepared from lignin. In particular, diglycidyl ether of isoeugenol derivatives are good candidates for the replacement of DGEBA. This article presents an effective and eco-friendly way to prepare epoxy resin derived from isoeugenol (BioIgenox), making its upscale possible. BioIgenox has been totally characterized by NMR, FTIR, MS and elemental analyses. Curing of BioIgenox and camphoric anhydride with varying epoxide function/anhydride molar ratios has allowed determining an optimum ratio near 1/0.9 based on DMA and DSC analyses and swelling behaviours. This thermoset exhibits a Tg measured by DMA of 165 °C, a tensile storage modulus at 40 °C of 2.2 GPa and mean 3-point bending stiffness, strength and strain at failure of 3.2 GPa, 120 MPa and 6.6%, respectively. Transposed to BioIgenox/hexahydrophtalic anhydride, this optimized formulation gives a thermoset with a Tg determined by DMA of 140 °C and a storage modulus at 40 °C of 2.6 GPa. The thermal and mechanical properties of these two thermosets are consistent with their use as matrices for structural or semi-structural composites. View Full-Text
Keywords: bio-based resins; epoxy thermosets; isoeugenol; crosslinking density; DMA bio-based resins; epoxy thermosets; isoeugenol; crosslinking density; DMA
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MDPI and ACS Style

Ruiz, Q.; Pourchet, S.; Placet, V.; Plasseraud, L.; Boni, G. New Eco-Friendly Synthesized Thermosets from Isoeugenol-Based Epoxy Resins. Polymers 2020, 12, 229.

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