Publisher's Synopsis
Excerpt from Separation and Purification Section: Summary of Activities, July 1969 to June 1970
The dependence of the swollen volume of an ion exchange resin upon humidity is believed to be a thermodynamic property and, therefore, path independent. The testing of this hypothesis has not been thoroughly examined beyond the initial studies of Boyd and Soldano [3] who first established experi mental consistency with isopiestic water vapor pressure equilibrations of various ion exchangers. At water vapor pressures corresponding to water activities of less than slower swelling or deswelling rates are expected. In addition, there is a possibility that repeated swelling cycles towards higher humidities could be influenced by resin structural changes.
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