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W. Zhai, C. B. Park and M. Kontopoulou, “Nanosilica Addition Dramatically Improves the Cell Morphology and Expansion Ratio of Polypropylene Heterophasiccopolymer Foams Blown in Continuous Extrusion,” Industrial & Engineering Chemistry Research, Vol. 50, No. 12, 2011, pp. 7282-7289. doi:10.1021/ie102438p

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• TITLE: Dielectric Behavior of Some Vinyl Polymers/Montmorillonite Nanocomposites on the Way to Apply Them as Semiconducting Materials

  AUTHORS: Amal Amin, Eman H. Ahmed, Magdy W. Sabaa, Magdy M. H. Ayoub, Inas K. Battisha

  KEYWORDS: Nanocomposites; Atom Transfer Radical Polymerization; Insulation; Dielectric Measurements; Intercalation; Polarization

  JOURNAL NAME: Open Journal of Organic Polymer Materials, Vol.3 No.3, July 11, 2013

  ABSTRACT: Some vinyl polymers/montmorillonite nanocomposites were prepared via in-situ-atom transfer radical polymerization (ATRP) in presence of clay. Methyl methacrylate, styrene and n-butyl methacrylate were involved in the formation of such polymeric nanocomposites. Their dielectric properties were extensively studied to invest them in the a.c. power applications. Several dielectric parameters such as dielectric constant loss (ε") and a.c. conductivity (σ) were measured at both different frequencies (0.1 Hz to 100 KHz) and temperature ranged from (20℃ to 90℃). From the dielectric results, it was realized that the dielectric a.c. conductivity was enhanced by increasing the temperature for the four prepared polymer nanocomposites.