GLASS TRANSITION REDUCTIONS IN THIN FREELY-STANDING POLYMER FILMS: A SCALING ANALYSIS OF CHAIN CONFINEMENT EFFECTS

K. Dalnoki-Veress, J.A. Forrest, P.-G. de Gennes and John Dutcher
J. Phys. IV France 10, Pr7-221 - Pr7-226 (2000).

ABSTRACT

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 T_g. A tentative mechanism for T_g reductions in thin freely-standing films is discussed.

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