| Issue |
Europhys. Lett.
Volume 50, Number 1, April I 2000
|
|
|---|---|---|
| Page(s) | 35 - 40 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2000-00231-y | |
| Published online | 01 September 2002 | |
Wetting transition in a binary polymer blend
1
Smoluchowski Institute of Physics, Jagellonian University
Reymonta 4, 30-059 Kraków, Poland
2
Surface Spectroscopy Laboratory, University of Mining and Metallurgy and
JCCASR Jagellonian University - Reymonta 23, 30-059 Kraków, Poland
3
Department of Materials and Interfaces, Weizmann Institute of Science
76100 Rehovot, Israel
4
Exxon Research and Engineering Company - Annandale, NJ 08801, USA
Corresponding author: ufbudkow@cyf-kr.edu.pl
Received:
15
November
1999
Accepted:
18
January
2000
We have used composition depth profiling, based on nuclear-reaction analysis and secondary ion mass spectroscopy, to study segregation at the free surface of a partly miscible binary mixture consisting of random olefinic copolymers. The equilibrium surface excess data, analysed within a mean-field Cahn approach, point to a wetting transition. The surface phase diagram obtained was confirmed by the observed dynamics of the segregation from a coexistence composition: the monotonic and halted growth of the surface layer was observed at temperatures above and below the predicted wetting point, respectively.
PACS: 36.20.-r – Macromolecules and polymer molecules / 68.10.-m – Fluid surfaces and fluid-fluid interfaces / 68.45.Gd – Wetting
© EDP Sciences, 2000
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