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 (T
5% = 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.
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