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Polymères nanocomposites multifonctionnels. Impact sur les propriétés mécaniques de polymères à mémoire de forme

Abstract : These works based on the developments of polymer nanocomposites illustrate the possibility of creating shape memory hybrid materials from a semi-crystalline thermoplastic elastomer copolymer, the poly(ethylene – vinyl acetate). Amongst the different approaches which exist to obtain thermo-responsive shape memory polymers, we chose to elaborate chemically crosslinked networks in attendance of an inorganic component as silicon oxo-polymer or titanium oxo-polymer. Tensile test showed that hybrid materials with titanium oxo-polymer provide an important reinforcement. At room temperature and at 100 °C, the elastic modulus of the material increase more than 3.8 times and 57 times in comparison to organic reference material crosslinked by peroxides. As the reference material, all nanocomposites display shape memory properties under appropriate conditions of time, stress and temperature. With titanium oxo-polymer, the dynamic iono-covalent nature of the hybrid interface bring news properties. Thermadapt nanocomposite materials are obtained. The use of an organic – inorganic hybrid material enable by tuning nanostructuration and nature of the hybrid interface to obtain multifunctional materials with shape memory properties, reprocessability, recyclability and thermally induced healing properties.
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Marion Jannot. Polymères nanocomposites multifonctionnels. Impact sur les propriétés mécaniques de polymères à mémoire de forme. Matériaux. Sorbonne Université, 2018. Français. ⟨NNT : 2018SORUS549⟩. ⟨tel-03065827⟩

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