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Flow injection of branched polymers inside nanopores

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

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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.


PACS

83.50.-v Deformation and flow

61.25.H- Macromolecular and polymers solutions; polymer melts

83.50.Ha Flow in channels

Subjects

Soft matter, liquids and polymers

Fluid dynamics

Dates

Issue 1 (October 2005)

Received 22 April 2005, accepted for publication 22 July 2005, in final form 22 July 2005

Published 26 August 2005



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