Abstract
Conditions are studied for reproducibly sulfonating small, spherical poly(styrene-divinylbenzene) beads to obtain cation exchangers suitable for ion chromatography. The effects of wetting agents and sulfonation parameters are noted. Resin capacity is examined as a function of crosslinking under fixed sulfonation conditions. Sulfonated resins of the highest crosslinking studied (12%) are shown to be very efficient for ion chromatography. Electron-photomicrographs show that sulfonization occurs only on the outer surfaces of the spherical beads.
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