Interfacial shear rheology of highly confined glassy polymers

Srivastava, S and Leiske, D and Basu, JK and Fuller, GG (2011) Interfacial shear rheology of highly confined glassy polymers. In: Soft Matter, 7 (5). pp. 1994-2000.

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Abstract

We present results on interfacial shear rheology measurements on Langmuir monolayers of two different polymers, poly(vinyl acetate) and poly(methyl methacrylate) as a function of surface concentration and temperature. While for the high glass transition poly(methyl methacrylate) polymer we find a systematic transition from a viscous dominated regime to an elastic dominated regime as surface concentration is increased, monolayers of the low glass transition polymer, poly(vinyl acetate), remain viscous even at very high surface concentrations. We further interpret the results in terms of the soft glassy rheology model of Sollich et al. P. Sollich, F. C. Lequeux, P. Hebraud and M. E. Cates, Phys. Rev. Lett., 1997, 78, 2020-2023] and provide evidence of possible reduction in glass transition temperatures in both poly(methyl methacrylate) and poly(vinyl acetate) monolayers due to finite size effects.

Item Type:	Journal Article
Publication:	Soft Matter
Publisher:	Royal Society of Chemistry
Additional Information:	Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Mar 2011 09:41
Last Modified:	21 Mar 2011 09:41
URI:	http://eprints.iisc.ac.in/id/eprint/35974

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