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Digitale Medien

Masked edge effects when measuring diffusion coefficients with the cup method (1994)

Claesson, J. ; Hagentoft, C.-E. ; Wadsö, L.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 34 (1994), S. 821-826

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Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: When diffusion coefficients are measured with the cup method, the exposed area is often less than the area of the sample. Because of this masking effect the measured diffusion coefficient is overestimated. The present article presents simple formulas based on two-dimensional analytical solutions to correct for this in cylindrical cup samples. Different cases of anisotropical diffusion are dealt with. The error in the analytical solutions is determined by numerical computer simulations.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760341007

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