Abstract
Differential scanning calorimetry was used to investigate the states of water in cellulose membranes grafted with acrylonitrile (AN). Examination of the melting endotherms and freezing exotherms showed the existence of three water states differing in their interaction with polymer molecules: free water, intermediate water, and bound water. The amount of intermediate water was remarkably reduced by grafting AN onto cellulose. The amounts of freezing water and nonfreezing water were estimated to elucidate the diffusive permeability of solutes through the membranes. The difference in permeability through the membranes may be explained by the difference in freezing water content. The intermediate water may not be appreciably related to the permeation of solutes through the membranes.
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Nishioka, N., Yoshimi, S., Iwaguchi, T. et al. Permeability through Cellulose Membranes Grafted with Vinyl Monomers in Homogeneous System II. States of Water in Acrylonitrile Grafted Cellulose Membranes. Polym J 16, 877–885 (1984). https://doi.org/10.1295/polymj.16.877
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DOI: https://doi.org/10.1295/polymj.16.877