"A microinterferometric method was used to study the effect of solute concentration on the diffusion coefficient in polymer solutions and also to determine the effect of polymer concentration on the diffusion coefficient. The polyacrylonitrile-dimethylformamide system was used as a means of determining the accuracy of the experimental apparatus and procedure. The non-ionic, water soluble polymer, hydroxyethyl cellulose (commercially known as Natrosol), was used to study this effect with urea and D-glucose as the solutes.
The results obtained for the polyacrylonitrile-dimethylformamide system were in close agreement with the results obtained by Secor, which meant that the experimental technique is accurate enough to give reproducible data. The differential diffusion coefficient increased with the increase in solute concentration in all cases. The effect of solute concentration on the differential diffusion coefficient was found to be similar for various polymer concentrations and different solutes. The integral diffusion coefficient remained almost constant for the concentration range of the solutes used in this work. No effect of polymer concentration on the integral diffusion coefficient could be deduced from the experimental data"--Abstract, page ii.
Wellek, Robert M.
Brown, Linda M.
Conrad, Frank H., 1902-1983
Grice, Harvey H., 1912-1993
Chemical and Biochemical Engineering
M.S. in Chemical Engineering
University of Missouri at Rolla
xi, 120 pages
© 1966 Girish T. Dalal, All rights reserved.
Thesis - Open Access
Polymer solutions -- Diffusion rate
Diffusion -- Mathematical models
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Electronic OCLC #
Link to Catalog Record
Dalal, Girish T., "A study of molecular diffusion in polymer solutions by a microinterferometric method" (1966). Masters Theses. 5757.