Behavior of a polymer chain in a critical binary solvent
Max-Planck-Institut für Polymerforschung,
Postfach 3148, D-55021 Mainz, Germany
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