Synthesis and characterization of PMMA/silylated MMTs

TitleSynthesis and characterization of PMMA/silylated MMTs
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2011
AuthorsDe Maria, A., Aurora A., Montone A., Tapfer L., Pesce Emanuela, Balboni R., Schwarz M., and Borriello C.
JournalJournal of Nanoparticle Research
KeywordsAcrylic monomers, Agglomeration, Chemical analysis, clay, Clay minerals, conference paper, Contact angle, Decomposition temperature, Differential scanning calorimetry, Esters, Fractured surfaces, In-situ, Loading percentages, MMT, Modified clays, montmorillonite, nanocomposite, Nanocomposites, Organosilanes, PMMA, poly(methyl methacrylate), Polymer matrix, polymerization, priority journal, Scanning electron microscopy, SEM image, silylation, Silylation reaction, Silylations, Sodium, synthesis, Synthesis (chemical), Thermodynamic properties, Thermodynamic stability, Thermogravimetric analysis, thermogravimetry, XRD

Commercially available Sodium clay (Dellite HPS) and organo-clay (Dellite 72T) are modified via a silylation reaction. These silylated clays are characterized by IR, XRD, thermogravimetric analyses, and their equilibrium contact angles are measured. They are used to prepare nanocomposites at different loading percentage (1, 3, 5% wt) by in situ intercalative polymerization of Methyl methacrylate and morphology and thermal properties of nanocomposites are examined. SEM images of nanocomposites fractured surface show the absence of clays aggregates, confirming a good dispersion and distribution of montmorillonites in the polymer matrix. The effects of modified clays on the thermal properties of nanocomposites are analyzed by differential scanning calorimetry and thermogravimetric analyses showing an increase of glass and decomposition temperatures of all nanocomposites respect to homopolymer ones. The best results are obtained in the presence of silylated montmorillonites, clearly the organosilane improves the compatibility between polymer matrix and clay and as effect the properties of nanocomposites. © Springer Science+Business Media B.V. 2011.


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