Glass Transition Reductions in Thin Freely-standing Polymer Films: a Scaling Analysis of Chain Confinement Effects

نویسندگان

  • K. Dalnoki-Veress
  • J. A. Forrest
  • P. G. de Gennes
  • J. R. Dutcher
چکیده

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 freelystanding films is discussed.

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تاریخ انتشار 2002