Scaling and Crossover to Tricriticality in Polymer Solutions

Details Scaling and Crossover to Tricriticality in Polymer Solutions Scaling and Crossover to Tricriticality in Polymer Solutions

2000-10-28

arxiv.org/abs/cond-mat/0010468v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1134/1.1348485

We propose a scaling description of phase separation of polymer solutions. The scaling incorporates three universal limiting regimes: the Ising limit asymptotically close to the critical point of phase separation, the "ideal-gas" limit for the pure-solvent phase, and the tricritical limit for the polymer-rich phase asymptotically close to the theta point. We have also developed a phenomenological crossover theory based on the near-tricritical-point Landau expansion renormalized by fluctuations. This theory validates the proposed scaled representation of experimental data and crossover to tricriticality.

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