Air shear driven flow of thin perfluoropolyether polymer films

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Publication Type Journal Article
School or College College of Engineering
Department Materials Science & Engineering
Creator Scarpulla, Michael
Other Author Mate, C. Mathew; Carter, Malika D.
Title Air shear driven flow of thin perfluoropolyether polymer films
Date 2003
Description We have studied the wind driven movement of thin perfluoropolyether (PFPE) polymer films on silicon wafers and CNx overcoats using the blow-off technique. The ease with which a liquid polymer film moves across a surface when sheared is described by a shear mobility xS , which can be interpreted both in terms of continuum flow and in terms of wind driven diffusion. Generally, we find that the movement of PFPE films can be described as a flow process with an effective viscosity, even when the film thickness is smaller than the polymer's diameter of gyration. Only in the special case of sparse coverage of a polymer with neutral end groups is the motion better described by a wind driven diffusion process. The addition of alcohol end groups to the PFPE polymer chain results in strong interactions with the substrate, creating a restricted layer having an effective viscosity an order of magnitude larger than the mobile layer that sits on top of the restricted layer.
Type Text
Publisher American Institute of Physics (AIP)
Journal Title The Journal of Chemical Physics
Volume 118
Issue 7
First Page 3368
Last Page 3375
DOI 10.1063/1.1536953
citatation_issn 219606
Subject Perfluoropolyether; Polymer films; Air shear; Shear mobility
Subject LCSH Thin films; Polymers; Viscosity
Language eng
Bibliographic Citation Scarpulla, M. A., Mate, C. M., & Carter, M. D. (2003). Air shear driven flow of thin perfluoropolyether polymer films. Journal of Chemical Physics, 118(7), 3368-75.
Rights Management (c)American Institute of Physics. The following article appeared in Scarpulla, M. A., Mate, C. M., & Carter, M. D., Journal of Chemical Physics, 118(7), 2003 and may be found at http://dx.doi.org/10.1063/1.1536953
Format Medium application/pdf
Format Extent 138,227 bytes
Identifier ir-main,12274
ARK ark:/87278/s6988rm8
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706884
Reference URL https://collections.lib.utah.edu/ark:/87278/s6988rm8
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