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Prediction of the release characteristics of alcohols from EVA using a model based on Fick's second law of diffusion
Author(s) -
Krüger Arnoldus J.,
Tolmay Andries T.
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10333
Subject(s) - diffusion , polymer , thermodynamics , alcohol , fick's laws of diffusion , materials science , chemistry , organic chemistry , physics
This study evaluates the use of a simple mathematical model to predict release characteristics of volatile substances from polymer dispensers. The model can be used to simplify the design process of polymer dispensers, which is traditionally done by trial and error. The coefficients of diffusion, D, of four alcohols through EVA disks were determined with the time lag technique. The value of D was used to predict the residual mass of dispensers over time using a model based on Fick's second law of diffusion. Injection‐molded dispensers containing 10% alcohol were prepared, and the release of the alcohol were monitored experimentally. The modeled results were compared to the experimental results. A good correlation was found between the predictions and the experimental results. © 2002 John Wiley & Sons, Inc. J Appl Polym Sci 84: 806–813, 2002; DOI 10.1002/app.10333