ISSN:
1573-904X
Schlagwort(e):
diffusion measurements
;
semi-solids
;
polymer matrixes
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Purpose. To develop and evaluate a simple, yet well defined, method to measure diffusion in semi-solids, i.e. polymeric materials. Methods. The method was based on a concept where equivalent discs of polymeric films were cut and stacked on top of each other. The diffusion process was allowed to proceed unidimensionaly through the stack of films perpendicular to the film surface. After an appropriate time, the stack was analysed disc by disc with respect to solute content and from the concentration profile so obtained the diffusion coefficient was calculated. Results. An all-in-one device was developed, manufactured in stainless-steel, that cuts circular discs and stores each one successively in a “stack” in the cell compartment. Conclusions. Data from a silicone based system shows that the method, although simple, is accurate and reproducible.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1016097411615
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