The Kinetics of Wetting Fiberglas-E with Water Vapor,
IOWA STATE UNIV AMES ENGINEERING RESEARCH INST
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The kinetics of adsorption of water vapor on an E-glass surface are studied using the theory of rate processes. From this study and from sorption isotherm and infrared adsorption data, the authors suggest that the hysteresis of the sorption isotherm is due 1 to the formation of hydroxyl groups which diffuse into the glass, and 2 to the attractive forces existing in fine internal capillaries. The activation energy of adsorption of water vapor by E-glass is found to be quite high, perhaps due to a combination of adsorption, solubility, and diffusion. However, it appears that the rate controlling step is the formation of cation hydroxyl bonds within the glass surface region for which the activation energy is in the order of the average cation oxygen bond strength of the glass.
- Atomic and Molecular Physics and Spectroscopy