Percolation model of interfacial effects in polymeric glasses

Recent observations using fluorophore probes of local dynamics in polymer films have provided new insight into the glass transition. Using a percolation model, we predict the local T g in a polymer film, as a function of distance from a substrate or a free surface. Our predictions are in good agreem...

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Bibliographic Details
Published inThe European physical journal. B, Condensed matter physics Vol. 72; no. 1; pp. 133 - 137
Main Authors Lipson, J.E.G., Milner, S. T.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.11.2009
EDP Sciences
Subjects
Complex Systems
Condensed Matter Physics
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Fluid- and Aerodynamics
Glass transitions
Mesoscopic and Nanoscale Systems
Physics
Physics and Astronomy
Solid State Physics
Specific phase transitions
68.08.-p Liquid-solid interfaces
64.70.pj Polymers
64.70.Q- Theory and modeling of the glass transition
Glass transition
Percolation theory
Free surface
Glassy polymer
Glass
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Summary:Recent observations using fluorophore probes of local dynamics in polymer films have provided new insight into the glass transition. Using a percolation model, we predict the local T g in a polymer film, as a function of distance from a substrate or a free surface. Our predictions are in good agreement with the observed elevation of T g near a substrate, whereas the observed reduction of T g near a free surface is too strong to be accounted for by percolation effects.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2009-00324-y