International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Thermal and dielectric properties of polypyrrole-poly(methyl methacrylate) nanocomposites

M. E.  Achour1*, A. Droussi1, D. Medine2, A. Oueriagli3, A. Outzourhit3, A. Belhadj Mohamed4 and H. Zangar4        
1Département de Physique,  Faculté des Sciences, Equipe: Systèmes, Propagation et Caractérisation des Matériaux (LASTID), B.P:133, 14 000 Kénitra, Morocco. 2 Institut National de la Recherche Scientifique INRS, 1650, Bd Lionel Boulet  C.P 1020, Varennes (Québéc) J3X 1S2, Canada. 3Laboratoire de Physique des Solides et des Couches Minces, Semlalia, Marrakech, Morocco. 4Département de Physique, Faculté des Sciences, Campus Universitaire 2092 El Manar, Tunis, Tunisia.  
Email: [email protected]

  •  Accepted: 16 December 2010
  •  Published: 02 October 2011

Abstract

Thermal properties of the polypyrrole-poly(methyl methacrylate) (PPy)-(PMMA) compositeswere analyzed by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC).  A decrease in the glass transition temperatures Tg with the PPy concentration content reveals the increase of segmental motion. Dielectric properties of these composites were studied in the frequency range between 100 Hz and 100 KHz at room temperature for various weight percentage of PPy. The results of the spectra of complex permittivity obey power laws of Jonscher.  The values of the exponents n and p are close to 1, which corresponds to a fully correlated system. 

 

Key words: Composites, dielectric properties, percolation threshold, conducting polymer.

Abbreviation

TGA, Thermal gravimetric analysis; DSC, differential scanning calorimetry; PPy, polypyrrole; PMMA, poly(methyl methacrylate).