| Numéro |
J. Phys. II France
Volume 5, Numéro 4, April 1995
|
|
|---|---|---|
| Page(s) | 491 - 495 | |
| DOI | https://doi.org/10.1051/jp2:1995145 | |
DOI: 10.1051/jp2:1995145
J. Phys. II France 5 (1995) 491-495
1 ESPCI, Physico-Chimie Théorique, 10 rue Vauquelin, 75231 Paris Cedex 05, France
2 PSI, Institut P. et M. Curie, 11 rue P. et M. Curie, 75231 Paris Cedex 05, France
3 Collège de France, 1 place M. Berthelot, 75231 Paris Cedex 05, France
© Les Editions de Physique 1995
J. Phys. II France 5 (1995) 491-495
Drag on a Tethered Chain Moving in a Polymer Melt
A. Ajdari1, F. Brochard-Wyart2, C. Gay3, P.G. de Gennes3 and J.L. Viovy11 ESPCI, Physico-Chimie Théorique, 10 rue Vauquelin, 75231 Paris Cedex 05, France
2 PSI, Institut P. et M. Curie, 11 rue P. et M. Curie, 75231 Paris Cedex 05, France
3 Collège de France, 1 place M. Berthelot, 75231 Paris Cedex 05, France
(Received 17 January 1995, accepted 25 January 1995)
Abstract
A chain of
N monomers is attached to a small colloïdal particle, and is pulled (at a velocity
V) inside a polymer melt (chemically identical, with
P monomers per chain). The main parameter for this problem is the number
X(V) of
P chains entangled with the (
N) chain. Earlier estimates of
X are criticized, and a new form is proposed: at large
, we are led to a "Stokes" regime,
X=N1/2, while at smaller
, we find a "Rouse" regime,
(where
is the number of monomers per entanglement).
© Les Editions de Physique 1995