Abstract
AbstractWhen the reduced viscosity of a polymer is determined in a mixed solvent, selective absorption may depress the observed value of Huggins' constant so that comparison with results obtained in single solvents or different mixed solvents becomes meaningless. This undesirable effect would be eliminated if the polymer solutions were first brought to equilibrium with the desired solvent mixture through a semi‐permeable membrane. A method is derived whereby Huggins' constant determined in the conventional manner may be corrected, provided appropriate thermodynamic data are available. The method is demonstrated for a polyelectrolyte‐in simple electrolyte solutions.
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