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Viscosity from ternary mixtures of two weakly charged polyelectrolytes in solution

✍ Scribed by Borsali, Redouane ;Rinaudo, Marguerite

Publisher
Wiley (John Wiley & Sons)
Year
1993
Weight
536 KB
Volume
2
Category
Article
ISSN
1018-5054

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✦ Synopsis

Abstract

The mode‐mode coupling approximation (MMCA) is applied to describe the behavior of the reduced viscosity Ξ·~r~ from ternary mixtures of two weakly charged polyelectrolytes in solution. Similarly (Ξ΅ = +1) as well as oppositely (Ξ΅ = βˆ’1) weakly charged polyions are discussed in this work. The variation of Ξ·~r~ with the total polyelectrolyte concentration C~T~ exhibits a peak. The position and the height of this peak show for a given concentration of added salt C~S~ a sensitive variation with: the charge parameters (degrees of ionization) f~1~ and f~2~ of both polyelectrolytes, the proportion of polyelectrolyte 1 within the mixture (x = C~1~/C~T~) and the Flory interaction parameter Ο‡~F~ between monomeric units of different species. This calculation is presented within the framework of the Rouse model where no hydrodynamic interactions are taken into account.

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