Deformation of globular polysoaps: extension, confinement and extensional flow
Department of Physical and Colloid Chemistry, Wageningen Agricultural University, 6703 HB Wageningen, The Netherlands
2 DRFMC/SI3M (UMR 5819) , CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
Revised: 19 November 1998
Published online: 15 May 1999
A theoretical model of the extension and confinement of globular polysoaps predicts novel force laws. Polysoaps are polymers comprising of a flexible hydrophilic backbone incorporating, at intervals, amphiphilic monomers. The equilibrium configuration of long polysoaps, that form numerous spherical intrachain micelles, is a spherical globule of close packed micelles. The coupling of the deformation to the hierarchical self organization of the chain gives rise to a distinctive force law involving, for extension, two plateau regimes. When the chain is stretched by extensional flow the two regimes merge and the polysoap exhibits a single globule-stretch transition.
PACS: 36.20.Ey – Conformation (statistics and dynamics) / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 82.70.Dd – Colloids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999