Viscoelastic properties of polyelectrolyte solutions

Viscoelastic properties of polyelectrolyte solutions were studied in the absence and presence of added salt over a wide range of polymer concentration in comparison with those of non-ionic polymers in good solvents. In the semidilute region where the polymer concentration C is higher than the overlap concentration for viscosity C v * , but lower than C ** (ca. 0.3 kg/dm 3 ), the polymer concentration dependence of specific viscosity at zero-shear rate η 0 sp increases with increasing added-salt concentration C s and at high C s almost agrees with that of non-ionic polymers in good solvents. In the concentrated and entangled region where C>C J * and C>C ** , η 0 sp more steeply increases with C even in salt-free solutions, implying the screening of electrostatic interaction and the increase of local frictional coefficients as considered in concentrated non-ionic polymer solutions. In the dilute region where C is lower than the overlap concentration for steady-state compliance C J * , the steady-state compliance J e more strongly depends on molecular weight and C than in non-ionic polymer solutions. In the semidilute region where C>C J * , but C C J * and C>C ** , the polymer concentration dependence becomes similar to that of non-ionic polymer solutions. In the concentrated and non-entangled region where C C ** , the frequency dependences of storage and loss moduli are well explained by the modified Rouse model like non-ionic polymer systems in the same region. The experimental results in the semidilute region are well explained by our theory of viscoelastic properties of polyelectrolyte solutions based on the reptation model with electrostatic interactions.

[1]  Andrey V. Dobrynin,et al.  Scaling theory of polyelectrolyte solutions , 1995 .

[2]  Colby,et al.  Dynamics of semidilute polyelectrolyte solutions. , 1994, Physical review letters.

[3]  I. Noda,et al.  Viscoelastic properties of polyelectrolyte solutions. III. Dynamic moduli from terminal to plateau regions , 1994 .

[4]  I. Noda,et al.  Viscoelastic properties of polyelectrolyte solutions. 1. Zero-shear viscosity , 1992 .

[5]  Y. Yamaguchi,et al.  Preparation and Intrinsic Viscosity of Poly-(N-methyl-2-vinylpyridinium chloride) with Narrow Molecular Weight Distributions , 1990 .

[6]  I. Noda,et al.  Relaxation times of polymer solutions in the semidilute region for zero-shear viscosity , 1988 .

[7]  I. Noda.  Applicability of the Scaling Concepts to Thermodynamic and Viscoelastic Properties of Polymer Solutions , 1988 .

[8]  M. Rinaudo,et al.  On the viscosity of sodium alginates in the presence of external salt , 1986 .

[9]  I. Noda,et al.  Steady-state compliance of linear polymer solutions over a wide range of concentration , 1985 .

[10]  I. Noda,et al.  Zero-shear viscosity of linear polymer solutions over a wide range of concentration , 1985 .

[11]  H. Vink.  A new convenient method for the synthesis of poly(styrenesulfonic acid) , 1981 .

[12]  E. Morris,et al.  Conformation and dynamic interactions in hyaluronate solutions. , 1980, Journal of molecular biology.

[13]  P. G. de Gennes,et al.  Dynamics of Entangled Polymer Solutions. I. The Rouse Model , 1976 .

[14]  M. Nagasawa.  Ion-Binding Phenomena of Polyelectrolytes , 1974 .

[15]  I. Noda,et al.  Steady flow measurements on moderately concentrated solutions of poly(sodium acrylate) , 1972 .