Water penetration in glassy polymers: Experiment and theory

M. Best, J. W. Halley, B. Johnson, J. L. Vallés

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We describe the design and implementation of a method based on infrared monitoring of the OD stretch mode which permits measurement of the diffusion profiles of water permeating glassy polymers for the first time. Results for several glassy polymers are compared with a theory of trapping diffusion which leads to a nonlinear diffusion problem in which the trapped water penetrates the polymer as a sharp front if there is a large amount of trapping. In the case of two of the polymers studied, the trapping model describes the data, very well (much better than a simple diffusion model) and permits determination of parameters related to the free volume and the residence time of the water on traps in the model. © 1993 John Wiley & Sons, Inc.

Original languageEnglish (US)
Pages (from-to)319-334
Number of pages16
JournalJournal of Applied Polymer Science
Issue number2
StatePublished - Apr 10 1993


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