Abstract
SYNTHETIC ion-exchange resins of the sulphonated polystyrene type consist essentially of a cross-linked hydrocarbon skeleton to which the functional groups (nuclear sulphonic acid residues) are attached in a rather uniform manner. In water, the resin swells to a degree depending upon the degree of cross-linkage, and thus the size of the pores in the swollen resin gel can be adjusted by varying the proportion of divinylbenzene used in the preparation of the polymer1.
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References
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PARTRIDGE, S. Ion-Exchange Resins as Molecular Sieves. Nature 169, 496–497 (1952). https://doi.org/10.1038/169496a0
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DOI: https://doi.org/10.1038/169496a0
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