Size-Dependent Depression of the Glass Transition Temperature in Polymer Films
Abstract
The glass transition temperature of thin polystyrene films has been measured as a function of film thickness. It is found that the glass transition decreases in temperature as the thickness of the film is reduced. The effect is not strongly molecular-weight dependent, ruling out chain confinement as the major cause; instead we suggest that at the surface of the glassy film a liquidlike layer exists whose size diverges as the glass transition...
Paper Details
Title
Size-Dependent Depression of the Glass Transition Temperature in Polymer Films
Published Date
Jul 1, 1994
Journal
Volume
27
Issue
1
Pages
59 - 64
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