Antioxidant properties of flax fibers in polyethylene matrix composites
2018
Van Schoors, Laetitia | Gueguen Minerbe, Marielle | Moscardelli, Sandrine | Rabii, Hajer | Davies, Peter
Flax fibers are commonly used to reinforce mechanical properties of polymer-matrix composites, but can also enhance antioxidative properties of polyethylene matrix: lignin, which is one of the components of plant fibers has the advantage of containing phenols, molecules well known for their antioxidant properties. In this study, its oxidative stabilization effect on unstabilized polyethylene matrix has been demonstrated. It has then been shown by thermal analysis, that the Oxidation Induction Time of the polyethylene matrix increases from 0 to 25 min when the flax fiber content is raised from 0 to 54%, and that the flax fibers cause a slight increase in the degradation temperature of the polyethylene matrix.During thermooxidative ageing, this study has highlighted that the flax fibers also improve the oxidative stability of the polyethylene by inhibiting the oxidation mechanisms of the polyethylene matrix.
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