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High Performance Polymers
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Dewetting Properties of Polystyrene Homopolymer Thin Films on Grafted Polystyrene Brush Surfaces

S Sharma

Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794-2275, USAssharma{at}ic.sunysb.edu

M H Rafailovich

J Sokolov

Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794-2275, USA

Y Liu

Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794-2275, USA; Kodak, 343 State Street, Rochester, NY 14650, USA; Kodak, 343 State Street, Rochester, NY 14650, USA

S Qu

Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, NY 11794-2275, USA; Gore-Tex, Eau Claire, WI 54701, USA

S A Schwarz

Physics Department, Queens College, Flushing, NY 11367, USA

A Eisenberg

Department of Chemistry, McGill University, Montreal, Canada H3A 2TS

We have found that the critical molecular weight for auto dewetting of a homopolymer on a polymer brush of the same chemical composition is approximately NH = 0.5NB, in good agreement with the mean field theory prediction. The measured velocity on the brush surface is at least an order of magnitude faster than that of the polystyrene (PS) on a homopolymer interface, with a greatly decreased dependence on the PS molecular weight. This suggests slippage as a possible mechanism for the dewetting dynamics.

High Performance Polymers, Vol. 12, No. 4, 581-586 (2000)
DOI: 10.1088/0954-0083/12/4/313
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