Europhys. Lett.
Volume 72, Number 1, October 2005
Page(s) 83 - 88
Section Condensed matter: structural, mechanical and thermal properties
Published online 26 August 2005
Europhys. Lett., 72 (1), pp. 83-88 (2005)
DOI: 10.1209/epl/i2005-10190-3

Flow injection of branched polymers inside nanopores

T. Sakaue1, E. Raphaël1, P.-G. de Gennes2 and F. Brochard-Wyart2

1  Physique de la Matière Condensée, FRE 2844 CNRS, Collège de France 11 place Marcelin Berthelot, 75231 Paris Cedex 05, France
2  Institut Curie - 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France

received 22 April 2005; accepted in final form 22 July 2005
published online 26 August 2005

Flexible chains (linear or branched) can be forced to enter into a narrow capillary by using a hydrodynamic flow. Here, we correct our earlier description of this problem by considering the progressive nature of the suction process. We find that the critical current for penetration, Jc, is controlled by the entry of a single blob of the capillary size, and that its scaling structure is the same for branched and linear chains.

61.25.Hq - Macromolecules and polymer solutions; polymer melts; swelling.
83.50.-v - Deformation and flow.
83.50.Ha - Flow in channels.

© EDP Sciences 2005