References of "SCLAVONS, M"
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See detailInfluence of homogenization and drying on the thermal stability of microfibrillated cellulose
QUIEVY, N.; Jacquet, Nicolas ULg; SCLAVONS, M. et al

in Polymer Degradation and Stability (2010), 95

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See detailInfluence of homogenization and drying on the thermal stability of microfibrillated cellulose
QUIEVY, N.; Jacquet, Nicolas ULg; SCLAVONS, M. et al

in Polymer Degradation and Stability (2010), 95

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See detailProbing thermoplastic matrix-carbon fiber interphases. 1. Preferential segregation of low molar mass chains to the interface
Carlier, V.; Sclavons, M.; Jonas, Alain M et al

in Macromolecules (2001), 34(11), 3725-3729

The molecular mobility of polystyrene (PS) chains near the surface of carbon fibers was investigated. The glass transition temperature of very thin coatings deposited on carbon fibers was measured by ... [more ▼]

The molecular mobility of polystyrene (PS) chains near the surface of carbon fibers was investigated. The glass transition temperature of very thin coatings deposited on carbon fibers was measured by supported DMTA in order to probe the properties of the thermoplastic interphase. Depending on the fiber impregnation method from the melt or from solution, Tg changed in an opposite way for the thinnest coatings, decreasing with coating thickness in the case of impregnation in the melt and increasing when a polymer solution was used. This observation is explained by degradation of PS in the melt and subsequent preferential segregation of low molar mass chains to the interface. This conclusion is supported by the study of the Tg of coatings made from a bimodal molar mass distribution. [less ▲]

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See detailDynamic mechanical thermal and infrared analyses of polyacrylonitrile "electrografted" onto a metal
Calberg, Cédric ULg; Mertens, Marc; Baute, Noëlle et al

in Journal of Polymer Science. Part B, Polymer Physics (1998), 36(4), 543-553

Polyacrylonitrile (PAN) films have been grafted onto copper electrodes by cathodic polarization and analyzed by infrared spectroscopy and dynamic mechanical thermal analysis (DMTA). The dynamic mechanical ... [more ▼]

Polyacrylonitrile (PAN) films have been grafted onto copper electrodes by cathodic polarization and analyzed by infrared spectroscopy and dynamic mechanical thermal analysis (DMTA). The dynamic mechanical response shows two or three transitions depending on the film thickness and the potential deposition. The viscoelastic properties of ungrafted PAN films, e.g., solvent cast films of commercially available PAN, are deeply different from those of electrografted films. The experimental data support that ungrafted chains are paracrystalline in contrast to the grafted ones which are essentially amorphous. Moreover, the irreversible transformation of the grafted PAN chains observed beyond 225°C is confirmed by Fourier transform infrared (FTIR) analysis and ascribed to an intramolecular cyclization of PAN into polyimine. This reaction occurs rapidly and at a comparatively low temperature with respect to ungrafted PAN, which suggests that the grafted chain configuration might be predominantly isotactic. The isotacticity and the amorphous structure appear to decrease as the thickness of the PAN film is increased. Literature data and the herein reported observations would suggest a dependence of the amorphous structure of PAN on the chain isotacticity. [less ▲]

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