Viscometric determination of the two critical concentrations of polymers in solution

Abstract A viscometric study is presented using ternary systems polymer-1/polymer-2/solvent. The variation of the reduced viscosity of the polymer mixture with the total concentration shows two crossover points corresponding to the two critical concentrations of polymers C ∗∗ and C ∗. The influences of the temperature and of the hydrodynamic volume of the polymers on the critical concentrations are also presented.