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The Glass Transition of Miscible Binary Polymer-Polymer Thin Films

Published

Author(s)

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

Abstract

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.
Citation
Physical Review Letters
Volume
97

Keywords

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

Citation

Bescancon, B. , Soles, C. and Green, P. (2006), The Glass Transition of Miscible Binary Polymer-Polymer Thin Films, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852661 (Accessed June 24, 2024)

Issues

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Created August 3, 2006, Updated October 12, 2021