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Theses

Synthèse et caractérisation de nanocomposites polymères / hydroxydes doubles lamellaires (HDL)

Abstract : This thesis presents a synthesis and characterization of polymer nanocomposites using as support layered double hydroxides (HDL). In the first part, we characterized the reactive load resulting from the intercalation of surfactant monomers such as sulfopropylmethacrylate (AMP), 4 [12 (methacryloylamino) dodecanoylamino] benzene (MADABS) and 2-acrylamido-2- methyl-1-propane sulfonic acid (AMPS). Similarly, other hybrid phases obtained from poly (SPMA) and poly (AMPS) have been characterized. The in-situ polymerization is carried out in the case of AMPS and SPMA by spectroscopy (IR and RMN13 C CP-MAS). Nancomposites for polymers obtained from the dispersion of fillers HDL hybrid structure sandwiched was observed in the case of SPMA and MADABS and another immiscible in the case of AMPS. Rheological interesting results are found in the case of SPMA whatever the nature of hybrid phases by the formation of a gel network structure between the filler and the polymer. The results of rheology and TEM show that the physico-chemical nature of the support is a key factor in the dispersion and the structure of the percolation network load. In the second part, we characterized (XRD, IR, and NMR) the functional load of the resulting intercalation dyes such as Acid Orange 6-(C12 H9 N2 O5 S Na), direct yellow 50 (C35 H28 N6 O13 S4 Na4), red 75 (C33 H16 O15 Na4 N8 S4), acid green 25 (C28 H22 N2 O8 Na2 S2) and Evan blue (C34 H28 N6 O16 S4) Trypan blue (Niagara blue) (C34 H28 N6 014 S4) . The electron density map shows an arrangement in an inclined position in the interlamellar space of an angle of 35 ° on the axis is moved before the hydrothermal treatment and after treatment in a position parallel to the yellow in the interlayer space of the 'HDL. The protective effect of HDL structure is shown since temperature stability of the optical properties is observed. Improved rheological properties for nanocomposites formed is observed in the case of Orange and Niagara relative to polystyrene alone. This is explained by interaction type friction between PS chains and the dye molecules present in the surfaces of the crystallites, the structure of PS nanocomposites remaining apparently immiscible.
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  • HAL Id : tel-00730633, version 1

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Abdallah Illaik. Synthèse et caractérisation de nanocomposites polymères / hydroxydes doubles lamellaires (HDL). Matériaux. Université Blaise Pascal - Clermont-Ferrand II, 2008. Français. ⟨NNT : 2008CLF21858⟩. ⟨tel-00730633⟩

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