Title: Further Discussion on Method to Determine the Intrinsic Viscosity of Polyelectrolyte Solution
Abstract: According to the method presented by Wolf,the intrinsic viscosity of polyelectrolyte can be obtained either by extrapolating the generalized intrinsic viscosity {η} towards zero concentration C or by the initial slope of the dependence of the logarithm of the relative viscosity lnηr on polymer concentration C.Our research indicates that the value of the generalized intrinsic viscosity {η},the apparent intrinsic viscosity [η]app and the reduced viscosity ηsp/C become the same as extrapolating concentration C to zero.Furthermore,the viscosity measurement indicates that the dependence of {η},[η]app and ηsp/C with concentration C is just the same in extremely diluted polyelectrolyte solutions.This suggests that the method to determine the intrinsic viscosity of polyelectrolyte by extrapolating the generalized intrinsic viscosity {η} towards zero concentration C is essentially just the same as extrapolating ηsp/C towards zero concentration C in the Huggins ηsp/C versus C plot which is traditionally used.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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