ISSN:
1572-8927
Keywords:
sodium polyacrylate
;
polyacrylic acid
;
sodium chloride
;
aqueous solution
;
diffusion coefficients
;
three component systems
;
viscometry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Diffusion coefficients have been measured for the binary systems sodium polyacrylate-water and polyacrylic acid-water at 25°C as a function of concentration. Diffusion coefficients have been also measured for the ternary system sodium chloride-sodium polyacrylate-water at constant NaCl concentration and varying polyacrylate concentration. The experimental results have been compared with some limit expressions, available in literature, for the four D ik diffusion coefficients of systems containing two electrolytes with a common ion. The ternary system shows strong interaction between flows: as the polyelectrolyte concentration, C2, approaches zero, the main diffusion coefficient D22 and the cross coefficient D21 approach zero, while the cross coefficient D12 reach quite high values. The water motion during the diffusion process is also discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00644751
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