Universality of the coexistence curves in a polymer solution

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Abstract
On the basis of a geometrical consideration on the surface and of the homogeneous properties for coexistence curves, we deduce a scaling form τ/τc =F(φ/φc) for the family of coexistence curves in a polymer solution, where τ is the reduced temperature, τc the critical reduced temperature, φ the concentration, and φc the critical concentration. It is shown that the scaling form provides a reasonable representation of existing experimental results. The relevance to some current theoretical predictions of this equation is discussed.