1976
DOI: 10.1039/f19767200485
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Solute diffusion in polymer networks. Part 3.—Hydroxyethylcellulose gels; solvent effects and fluorescence depolarisation measurements

Abstract: Measurements of translational diffusion coefficients of oligosaccharides have been made as a function of temperature in a dilute hydroxyethylcellulose gel swollen in water, dimethyl formamide (DMF) and dimethyl sulphoxide (DMSO). The diffusion coefficients in the gel phase are substantially lower than the values for free diffusion in the bulk solvents in all cases. The influences of solvent character, temperature and polymer concentration on this reduction are discussed.Fluorescence depolarisation measurements… Show more

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Cited by 14 publications
(2 citation statements)
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“…A change in diffusion coefficient might have any effect on the retention volume (10). However, a diffusion coefficient increases with increasing temperature (11,12), resulting in an increase in retention volume. The residual change in the retention volume after correcting the change in the retention volume due to the difference between column temperature and solvent temperature is assumed to be due to the gel-solute interactions (Table IV, A -C).…”
Section: Resultsmentioning
confidence: 99%
“…A change in diffusion coefficient might have any effect on the retention volume (10). However, a diffusion coefficient increases with increasing temperature (11,12), resulting in an increase in retention volume. The residual change in the retention volume after correcting the change in the retention volume due to the difference between column temperature and solvent temperature is assumed to be due to the gel-solute interactions (Table IV, A -C).…”
Section: Resultsmentioning
confidence: 99%
“…In hydrogels, typical values of the product αθ range from 0.05 to 0.9, with larger solute molecules in general having lower values [43-47]. …”
Section: Calibration Using the Theorymentioning
confidence: 99%