Conception et synthèse d’une matrice polymère thermoplastique pour l’obtention de matériaux composites recyclables, résistants au feu et utilisables dans l’industrie

Abstract : Novel poly(methyl methacrylate) (PMMA) thermoplastic matrices which can be used in the elaboration of composite materials have been synthesized and characterized from the point of view of their glass transition temperature (by differential scanning calorimetry) and their thermal degradation (by thermogravimetric analysis and by pyrolysis combustion flow calorimetry). The strategy followed was to incorporate in the PMMA chains repeat units comprising a flame retardant phosphorous side group via a radical copolymerization of MMA with a phosphorus-containing monomer. A set of phosphorus-containing flame retardant monomers has been synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10 oxide (DOPO) by varying the nature of the polymerizable function (styrenic, acrylic, methacrylic), the nature of the atom bound to the phophore (oxygen, carbon, nitrogen) and the length of the spacer arm. We have shown that by adapting the structure and the quantity of the phosphorus repeating units, the glass transition temperature of the material was kept close to that of the PMMA while the thermal degradation of the materials was shifted to higher temperatures. Comparatively, physical blends of PMMA and DOPO with equivalent phosphorus contents exhibited significantly lower glass transition temperatures
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2018_0040_BIER.pdf
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https://hal.univ-lorraine.fr/tel-01920253
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Submitted on : Tuesday, November 13, 2018 - 10:08:33 AM
Last modification on : Wednesday, November 14, 2018 - 1:18:16 AM

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  • HAL Id : tel-01920253, version 1

Citation

Frédéric Bier. Conception et synthèse d’une matrice polymère thermoplastique pour l’obtention de matériaux composites recyclables, résistants au feu et utilisables dans l’industrie. Génie des procédés. Université de Lorraine, 2018. Français. ⟨NNT : 2018LORR0040⟩. ⟨tel-01920253⟩

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