| Issue |
Europhys. Lett.
Volume 42, Number 1, April 1998
|
|
|---|---|---|
| Page(s) | 7 - 12 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1998-00542-5 | |
| Published online | 01 September 2002 | |
Behavior of a polymer chain in a critical binary solvent
Max-Planck-Institut für Polymerforschung,
Postfach 3148, D-55021 Mainz, Germany
Corresponding authors: stapper@mpip-mainz.mpg.de vilgis@mpip-mainz.mpg.de
Received:
6
October
1997
Accepted:
6
February
1998
We present a field-theoretic renormalization group analysis of a
polymer chain immersed in a binary good solvent close to its critical
demixing point. We first show that this problem can be mapped on a
bicritical field theory, i.e. a 
-model with a mass anisotropy.
This implies that the end-to-end distance of the polymer is now controlled
by a new critical exponent 
related to the quadratic mass anisotropy
operator B. To show this, we solve the RG equation and calculate explicitly
the exponents and the mean end-to-end length of the chain.
PACS: 05.20.-y – Statistical mechanics / 36.20.-r – Macromolecules and polymer molecules / 64.60.-i – General studies of phase transitions
© EDP Sciences, 1998
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