The measurement of polymer swelling processes by an interferometric method and evaluation of diffusion coefficients

The amorphous polymer film swelling in a liquid solvent below the glass transition temperature was characterized by a few kinetic parameters (especially the mutual diffusion coefficient of swelling and its mean value) obtained by interference of monochromatic light in the wedge arrangement. This int...

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Bibliographic Details
Published in:International journal of molecular sciences 2010-02, Vol.11 (2), p.532-543
Main Author: Mracek, Ales
Format: Article
Language:English
Subjects:
concentration profile
Diffusion
hyaluronan
Hyaluronic Acid - chemistry
image analyses
Interferometry
Kinetics
Partial differential equations
Polymers
Polymers - chemistry
Software
Solvents
Solvents - chemistry
swelling
Temperature
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Summary:The amorphous polymer film swelling in a liquid solvent below the glass transition temperature was characterized by a few kinetic parameters (especially the mutual diffusion coefficient of swelling and its mean value) obtained by interference of monochromatic light in the wedge arrangement. This interferometric method allows one to determine the concentration field in the swollen surface layer and consequently to compute the concentration-dependent diffusion coefficient. A software system developed at the Department of Physics and Material Engineering at TBU in Zlin has been used for the evaluation of the main kinetic parameters of the swelling process. The software can be used for the on-line analyses of interferograms during the swelling process. The main application outputs are the computation of the concentration profile, the concentration gradient, the mutual diffusion coefficient of the swelling by the solvent and its mean value.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms11020532