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Featured researches published by G. Seytre.


Colloid and Polymer Science | 2014

Interfacial polarization in composite materials with spherical fillers: characteristic frequencies and scaling laws

Mariem Samet; G. Boiteux; G. Seytre; A. Kallel; Anatoli Serghei

The dielectric properties of composite materials consisting of a host matrix filled with spherical particles are investigated as a function of frequency by means of numerical calculations. Two different cases are analyzed: (a) composites with a conductive matrix and insulating fillers and (b) composites with an insulating matrix and conductive fillers. In both situations, dielectric dispersions due to interfacial polarization effects are observed in the dielectric spectra. In the present contribution, the characteristic frequencies of interfacial polarization effects are systematically analyzed in dependence on the volume fraction of the spherical fillers and on the conductivity values of the composite phases. The resulting scaling laws are discussed in detail.


Nanoscale Research Letters | 2014

Relaxation processes in hybrid organic-inorganic polymer nanosystems polymerized in situ

Maksym Iurzhenko; Yevgen Mamunya; G. Boiteux; G. Seytre; Erisela Nikaj; Olivier Gain; E.V. Lebedev; Svetlana Ishchenko

The relaxation processes of hybrid organic-inorganic polymer nanosystems (OIS) synthesized by joint polymerization of organic and inorganic components were studied using methods of differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), and broadband dielectric relaxation spectroscopy (DRS). The organic component was a mixture of two products: high-molecular-weight macrodiisocyanate (MDI) with low reactivity and low-molecular-weight isocyanate-containing modifier poly(isocyanate) (PIC) with high reactivity. Sodium silicate (SS) was used as inorganic component. The structures of the OIS obtained were in the form of hybrids with covalently connected building blocks and interpenetrating networks: weakly cross-linked network MDI/SS and highly cross-linked network PIC/SS. Depending on the MDI/PIC ratio, one of the networks was prevailing and created a continuous structure with domains of second network.PACS61.25.hk; 82.35.Lr; 64.70.pj


European Polymer Journal | 1988

Préparation, caracterisations, études diélectriques de quelques poly-vinylbenzylalkylcarbonates

M. Camps; J.P. Monthéard; J.F. Delzant; G. Boiteux; G. Seytre

Resume Cinq vinylalkylbenzylcarbonates ont ete prepares en trois etapes a partir du chloromethylstyrene puis polymerises. Les proprietes dielectriques de ces polymeres montrent que les permittivites les plus elevees sont obtenues lorsque le radical alkyl est peu volumineux.


Journal of Non-crystalline Solids | 2007

In situ monitoring of cyclic butylene terephtalate polymerization by dielectric sensing

Chady Hakme; Isabelle Stevenson; A. Maazouz; Philippe Cassagnau; G. Boiteux; G. Seytre


Journal of Membrane Science | 2012

Influence of film processing conditions on the morphology of polyamide 6: Consequences on water and ethanol sorption properties

Mathieu Sabard; Fabrice Gouanvé; Eliane Espuche; René Fulchiron; G. Seytre; Louise-Anne Fillot; Lise Trouillet-Fonti


European Polymer Journal | 2011

Influence of organo-clay on electrical and mechanical properties of PP/MWCNT/OC nanocomposites

V. Levchenko; Ye.P. Mamunya; G. Boiteux; M. Lebovka; Pierre Alcouffe; G. Seytre; E.V. Lebedev


European Polymer Journal | 2009

Dielectric behaviour of copolymers based on 2,2,2-trifluoroethyl methacrylate and cyano co-monomers

Ahmed Meskini; Mustapha Raihane; Bruno Ameduri; Chady Hakme; Daniel Sage; Isabelle Stevenson; G. Boiteux; G. Seytre; Hamid Kaddami


Journal of Sol-Gel Science and Technology | 2011

Influence of a non-polar medium (alkane and molten polypropylene) on the titanium n-butoxide hydrolysis-condensation reactions

Walid Bahloul; Véronique Bounor-Legaré; G. Seytre; Philippe Cassagnau


Journal of Non-crystalline Solids | 2009

Semi-interpenetrating polymer networks based on polyurethane and poly(2-hydroxyethyl methacrylate): Dielectric study of relaxation behavior

L.V. Karabanova; G. Boiteux; G. Seytre; Isabelle Stevenson; O. Gain; Chady Hakme; E.D. Lutsyk; Anna Svyatyna


Journal of Non-crystalline Solids | 2010

Dielectric properties of polyamide 6-montmorillonite nanocomposites

Erisela Nikaj; I. Stevenson-Royaud; G. Seytre; Laurent David; Eliane Espuche

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E.V. Lebedev

National Academy of Sciences of Ukraine

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Bruno Ameduri

École nationale supérieure de chimie de Montpellier

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