J. Phys. IV France
Volume 10, Numéro PR7, May 2000
International Workshop on Dynamics in Confinement
Page(s) Pr7-221 - Pr7-226
International Workshop on Dynamics in Confinement

J. Phys. IV France 10 (2000) Pr7-221-Pr7-226

DOI: 10.1051/jp4:2000744

Glass transition reductions in thin freely-standing polymer films : A scaling analysis of chain confinement effects

K. Dalnoki-Veress1, J.A. Forrest1, P.G. de Gennes2 and J.R. Dutcher3

1  Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U.K.
2  Collège de France, 11 place M. Berthelot, 75231 Paris cedex 05, France
3  Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1

In this paper we present a new analysis of data on the reduced glass transitions observed in thin freely-standing films. The empirical analysis presented is highly suggestive of the existence of a mechanism of mobility in thin freely-standing films that is inhibited in the bulk and distinct from the usual cooperative motion near the glass transition temperature Tg. A tentative mechanism for Tg reductions in thin freely-standing films is discussed.

© EDP Sciences 2000