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Cross-linking regulators in one-step synthesis of macronet ion-exchangers

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Cross-linking regulators in one-step synthesis of macronet ion-exchangers (EN)
Valkanas, NP (EN)
Theodoropoulos, AG (EN)
Konstantakopoulos, IC (EN)
Vrekou, VD (EN)
Valkanas, GN (EN)
journalArticle (EN)
2014-03-01T01:11:48Z
1996 (EN)
Hydrophillic macronet resins were prepared via a route which includes simultaneous sulphonation and cross-linking of styrene-acrylonitrile copolymer and polystyrene foam. Chlorosulphonic acid was employed as both the sulphonating reagent for the introduction of the sulphonic acid group on styrene units and the medium for the formation of sulphone-type cross-links. Controlled cross-linked structures were achieved by the parallel participation of acetic acid or acetic anhydride as sulphone cross-bridging regulators. The reaction yield, as well as the properties of the formed gels, were studied in respect to the cross-linking regulator concentration and the chlorosulphonic acid flow rate. Both strongly and weakly acidic ion-exchangers on the same substrate were achieved when styrene-acrylonitrile copolymer was used as a raw material. The synthesized macronet ion-exchangers were found to exhibit high swelling abilities and intermediate ion-exchange capacities while scanning electron microscopy (SEM) revealed their morphology. © 1996 Chapman & Hall. (EN)
Materials Science, Multidisciplinary (EN)
Scanning electron microscopy (EN)
Macronet ion exchangers (EN)
Sulphone type crosslinks (EN)
Swelling (EN)
Hydrophilic macronet resin (EN)
Structure (composition) (EN)
Crosslinking (EN)
Acetic anhydride (EN)
Synthesis (chemical) (EN)
Crosslinking regulator concentration (EN)
Copolymers (EN)
Ion exchangers (EN)
Chlorosulphonic acid (EN)
Morphology (EN)
Polystyrenes (EN)
Styrene (EN)
Sulfonation (EN)
Ion exchange (EN)
Sulphonic acid group (EN)
Foamed plastics (EN)
Journal of Materials Science (EN)
English
CHAPMAN HALL LTD (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
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