Polymer Engineering Faculty Research
Diffusion of Water in Sulfonated Polystyrene Ionomers
Abstract
Using gravimetry, we have studied the diffusion of water into sulfonated polystyrene ionomers . Diffusion coefficients were calculated from Fick’s equation. The water sorption was found to be dependent on the ion content (3.6–11 mol%) and the nature of the cation (H, Na, Li, or Zn). The sorption kinetics indicates a slight deviation from Fickian behavior. We used the analytical solution of Fick’s equation to evaluate the concentration profiles, which are in good agreement with the experimental results
This paper has been withdrawn.