title: Glass-transition temperature gradient in nanocomposites: evidence from nuclear magnetic resonance and differential scanning calorimetry.
abstract: The slowing-down of the dynamics of a polymer chain near a surface has been observed for many years now. Here we show that the behavior of model nanocomposites can be quantitatively described with a gradient of glass-transition temperature. We describe with a single parameter-the range of this gradient-the temperature and solvent effect on the spin relaxation dynamics. Moreover, this parameter allows a quantitative description of the nanocomposite calorimetric response from the one of the bulk polymer.
authors.affiliation: PPMD-SIMM, Soft Matter Science and Engineering, UMR 7615 CNRS/UPMC/ESPCI ParisTech, Paris, France. aurelie.papon@espci.org
authors.forename: Aurélie
authors.initials: A
authors.lastname: Papon
authors.forename: Hélène
authors.initials: H
authors.lastname: Montes
authors.forename: Mohamed
authors.initials: M
authors.lastname: Hanafi
authors.forename: François
authors.initials: F
authors.lastname: Lequeux
authors.forename: Laurent
authors.initials: L
authors.lastname: Guy
authors.forename: Kay
authors.initials: K
authors.lastname: Saalwächter