| Issue |
Europhys. Lett.
Volume 59, Number 1, July 2002
|
|
|---|---|---|
| Page(s) | 81 - 86 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00162-1 | |
| Published online | 01 June 2002 | |
Momentum-dependent interfacial tension in polymer solutions
1
Institut für Physik, Johannes Gutenberg-Universität Mainz
55099 Mainz, Staudinger Weg 7, Germany
2
Institute for Physical Chemistry, Bulgarian Academy of Sciences
1113 Sofia, Bulgaria
Received:
28
January
2002
Accepted:
15
April
2002
A model for the interface between a concentrated and a very dilute
polymer solution is studied by Monte Carlo simulations at temperatures
below the Theta temperature (in bad solvent conditions). The
wave-number–dependent interfacial tension 
is extracted from an
analysis of the capillary wave amplitudes. It is shown that 
decreases monotonically with q2, while no evidence is found
for the predicted increase 
with a
positive bending rigidity κ of the interface at large
q. Consequences for the interpretations of simulations and
experiments on interfacial widths are briefly discussed.
PACS: 68.08.Bc – Wetting / 68.08.-p – Liquid-solid interfaces / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling
© EDP Sciences, 2002
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