Laboratoire de physique des matériaux lamellaires et nanomatériaux hybrides, Institut de la science de la terre d'Orléans, Université d'Orléans, France
Zinc sulfide ZnS have been synthesized in reserves cores micelles in PS synthesized by emulsion polymerization. The size and morphology of ZnS/PS particles have been characterized via XRD, TEM, IR, SEM and AFM measurement. The dielectric proprieties of ZnS/PS are synthesized membrane, obtaining a water-swelling percentage around 20% and filled with ZnS nanoparticules were studied as a function of particle coating. The complex permittivity was measured with a 7600 Meter dielectric spectroscopy analyzer at applied voltage of 1 V with frequency varying between 10Hz and up to 1 KHz at different temperatures measurements are performed in dry conditions.
Polymer nanocomposites of polystyrene matrix containing 5 wt % of organoswy were prepared using the solution method with sonication 23 hours. CPBr is used to modify the SWY clay after suturing with surface with Na+. Polystyrene was synthesized through solution polymerization in the presence of potassium persulfate (KPS) as an initiator. The synthesized PS/oswy were characterized by XRD, FTIR, SEM methods. Frequency dependent complex dielectric function, loss tangent spectra of PS and PS/swy nanocomposites up to 5 wt %.The nanocomposite materials with low dielectric constant and loss tang compared to the pure polystyrene were obtained. The dielectric constant increase with the increase of temperatures.
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