Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The Glass Transition of Miscible Binary Polymer-Polymer Thin Films



Brian M. Bescancon, Christopher Soles, P A. Green


The average glass transition temperatures, Tg, of thin homopolymer films exhibit a thickness dependence, Tg(h), determined by a confinement effect and by the polymer segment/interface interactions. The Tgs of completely miscible thin film blends of tetramethyl bisphenol-A polycarbonate (TMPC) and deuterated polystyrene (dPS), supported by SiOx/Si, decrease with decreasing h for PS weight fractions f>0.1. This dependence is similar to that of PS and opposite to that of TMPC thin films. Based on an assessment of Tg(h,f), we suggest that the Tg(h,f) of miscible blends should be rationalized, additionally, in terms of the notion of a self-concentration and associated heterogeneous component dynamics.
Physical Review Letters


confinement, dynamics, glass transition, incoherent neutron scattering, polymer blends, thin films


Bescancon, B. , Soles, C. and Green, P. (2006), The Glass Transition of Miscible Binary Polymer-Polymer Thin Films, Physical Review Letters, [online], (Accessed June 24, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 3, 2006, Updated October 12, 2021