Liquid-gas transition in concentrated polymer solutions: Crossover effects

This is a continuation of our previous work [Phys. Rev. B 40, 2477 (1989)] on the liquid-gas transition for systems ranging from simple fluids through polymer solutions and microemulsions. We provide here the crossover calculations for various measurable quantities of the magnetic type defined in the text. Our calculations performed with the help of the field-theoretic methods reproduce, in the case of simple fluids, the results of Nelson and Rudnick [Phys. Rev. B 13, 2208 (1976)], who used the Wilson-Fisher style of renormalization. In the case of polymers, the results obtained are in very good agreement with available Monte Carlo and experimental data.