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Determination of the Complex Modulus of a Supported Ultra-Thin Polymer Film

Published

Author(s)

Christopher C. White, Wen-Li Wu

Abstract

A novel technique to quantitatively measure the complex modulus of ultra-thin polymer films (sub micron) is described. This technique employs a new mechanical impedance expression developed from a two-layer viscoelastic media model. This result is combined with a new instrumental design based on a highly modified quartz crystal microbalance with torsional resonators. Results from a 570 nm polystyrene film are presented. The demonstrated temperature dependence in the vicinity of Tg is similar to bulk behavior. The experimental details as well as the theoretical background are presented.
Citation
Applied Physics Letters

Keywords

complex modulus, quartz crystal microbalance, Tg, ultra-thin polymer film

Citation

White, C. and Wu, W. (2021), Determination of the Complex Modulus of a Supported Ultra-Thin Polymer Film, Applied Physics Letters (Accessed April 18, 2024)
Created October 12, 2021