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Quantifying the elasticity and viscosity of geometrically-confined polymer films via thermal wrinkling

Published

Author(s)

Edwin P. Chan, Qinhuang Lin, Christopher M. Stafford

Abstract

We apply thermal wrinkling, which is a surface instability that occurs during thermal annealing of polymer films geometrically confined by a rigid substrate and a flexible superstrate, to study the elasticity and viscosity of chemically-crosslinked polymer systems. Specifically, we present analytical expressions that relate the time- and temperature-dependent evolution of the wrinkle wavelength to the elastic modulus and shear viscosity of aluminum-capped polyhydroxystyrene films with different extent of chemical crosslinking. Our results demonstrate that the role of geometric confinement on the thermal wrinkling process is strongly dependent on the elastic versus viscous contributions of the polymer film.
Citation
Journal of Polymer Science Part B-Polymer Physics
Volume
50
Issue
22

Keywords

surface wrinkling, thin films, mechanical properties, viscoelastic properties, stress relaxation

Citation

Chan, E. , Lin, Q. and Stafford, C. (2012), Quantifying the elasticity and viscosity of geometrically-confined polymer films via thermal wrinkling, Journal of Polymer Science Part B-Polymer Physics (Accessed May 18, 2024)

Issues

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Created August 28, 2012, Updated February 19, 2017