Nanoscopic-Confinement Effects on Local Dynamics
- 31 January 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 84 (5), 915-918
- https://doi.org/10.1103/physrevlett.84.915
Abstract
The segmental dynamics of 1.5–2.0 nm polymer films confined between parallel solid surfaces is investigated with dielectric spectroscopy in polymer/silicate intercalated nanocomposites. The confinement effect is evident by the observation of a mode, much faster than the bulk-polymer relaxation and exhibiting much weaker temperature dependence. This is discussed in relation to either the interlayer spacing restricting the cooperative volume of the relaxation or to the dominance of the more mobile interphase regions as predicted by simulations; the data qualitatively support the former.
Keywords
This publication has 37 references indexed in Scilit:
- Polymer-Silicate Nanocomposites: Model Systems for Confined Polymers and Polymer BrushesPublished by Springer Nature ,1999
- Interface and Surface Effects on the Glass Transition in Thin Polystyrene FilmsPhysical Review Letters, 1997
- Effect of Free Surfaces on the Glass Transition Temperature of Thin Polymer FilmsPhysical Review Letters, 1996
- Effect of strongly favorable substrate interactions on the thermal properties of ultrathin polymer filmsPhysical Review E, 1996
- Structure and Dynamics of Polymer-Layered Silicate NanocompositesChemistry of Materials, 1996
- Polymer Layered Silicate NanocompositesAdvanced Materials, 1996
- Influence of an impenetrable interface on a polymer glass-transition temperaturePhysical Review E, 1995
- Size-Dependent Depression of the Glass Transition Temperature in Polymer FilmsEurophysics Letters, 1994
- Interface and surface effects on the glass-transition temperature in thin polymer filmsFaraday Discussions, 1994
- Observation of temperature dependent thicknesses in ultrathin polystyrene films on siliconPhysical Review Letters, 1993