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Science 24 December 1993:
Vol. 262. no. 5142, pp. 2010 - 2012
DOI: 10.1126/science.262.5142.2010
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Articles

A Simple Kinetic Model of Polymer Adsorption and Desorption

Jack F. Douglas 1, Harry E. Johnson 2, and Steve Granick 2

1 National Institute of Standards and Technology, Gaithersburg, MD 20899
2 Department of Materials Science and Engineering, University of Illinois, Urbana, IL 61801

A model of the desorption and adsorption of a polymer layer at a planar surface indicates a transition from exponential kinetics at high temperatures to nonexponential kinetics (stretched exponential with index one-half) at lower temperatures where these processes are diffusion-limited. Measurements of polystyrene desorption through polyisoprene overlayers show this predicted transition. Corroborative results are obtained for polystyrene desorption through polymethylmethacrylate overlayers. This identification of two distinct kinetic regimes suggests a unifying perspective from which to analyze polymer and biopolymer mobility at surfaces.

Submitted on August 3, 1993
Accepted on October 19, 1993


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
History dependence of protein adsorption kinetics.
C. Calonder, Y. Tie, and P. R. Van Tassel (2001)
PNAS 98, 10664-10669
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Science. ISSN 0036-8075 (print), 1095-9203 (online)