Dynamics of polymer melts confined between adsorbing surfaces spaced at molecular dimensions
type: CreativeWork
description: New physics emerges when polyphenylmethylsiloxane (PPMS) adsorbed between mica surfaces spaced at molecular dimensions undergoes oscillatory shear. The polymers experience a dynamic liquid-like to rubber-like transition at the onset of long range surface forces $(\sim$4.5 R$\sb{\rm G}).$ The long time relaxations of the polymers are effectively frustrated at the start of the strong repulsive short range surface forces (hard-wall $\sim$2.8 R$\sb{\rm G}).$ The static surface forces and dynamic regimes scale with the size of the polymer molecules. This reflects the universal ranges of polymer melts perturbed by the adsorbing surfaces.
abstract: New physics emerges when polyphenylmethylsiloxane (PPMS) adsorbed between mica surfaces spaced at molecular dimensions undergoes oscillatory shear. The polymers experience a dynamic liquid-like to rubber-like transition at the onset of long range surface forces $(\sim$4.5 R$\sb{\rm G}).$ The long time relaxations of the polymers are effectively frustrated at the start of the strong repulsive short range surface forces (hard-wall $\sim$2.8 R$\sb{\rm G}).$ The static surface forces and dynamic regimes scale with the size of the polymer molecules. This reflects the universal ranges of polymer melts perturbed by the adsorbing surfaces.
author: Hu, Hsuan-Wei
language: eng
keywords: Chemistry, Polymer, Engineering, Chemical, Engineering, Materials Science
date published: 2011-05-07T13:12:53Z
date modified: 2026-07-22T22:25:18Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/21581