The sorption and diffusion of water in epoxy resins

The sorption and diffusion of water in epoxy resins

Sorption isotherms and diffusion coefficients for water were determined for thin films of TGDDM/DDS epoxy resins at 40, 50 and 60°C. A Langmuir-type curvature was observed for all isotherms in the region of lower activity. Hygrothermal cycling was accompanied with an increase in sorption capacity at...

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Veröffentlicht in:Journal of membrane science 1984, Vol.18, p.197-210
Hauptverfasser: Barrie, J.A., Sagoo, P.S., Johncock, P.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Surface properties
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Zusammenfassung:Sorption isotherms and diffusion coefficients for water were determined for thin films of TGDDM/DDS epoxy resins at 40, 50 and 60°C. A Langmuir-type curvature was observed for all isotherms in the region of lower activity. Hygrothermal cycling was accompanied with an increase in sorption capacity attributed largely to a localized component of the sorption. The diffusion coefficient increased with concentration but an analysis of the sorption—desorption rate curves suggests the system is not truly Fickian.
ISSN:0376-7388
1873-3123
DOI:10.1016/S0376-7388(00)85034-6