Herstellung und Charakterisierung pfropfpolymerisierter Anionenaustauscher für die Ionenaustauschchromatographie
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Philipps-Universität Marburg
Abstract
Anion exchangers were synthesized via graft polymerization of cationic styrene derivates to a
polystyrene-divinylbenzene backbone. It was shown that the capacity of anion exchangers depended
on the varied polarity and polymerization properties of the cationic styrene derivates.
Relevant sythetic parameters as solvent, initiator and polymeric backbone weremodified and the influence
to the separation characteristics evaluated. The functionalization included homopolymerization
of functional groups and graft polymerization to the polystyrene-divinylbenzene core as competing
reactions. Based on the determined functional principle of this graft method, a process optimization
was developed which led both to an increased synthesis yield and improved performance properties
by controlled addition of the initiator.
By synthesizing a novel functional group and grafting to polystyrene-divinylbenzene resins, new alternatives
to the current commercial anion exchangers for separation of small inorganic anions were
rendered possible.
Further functionalization of polymeric resins with a cationic styrene derivate of marginal polarity led
to anion exchangers suitable for element speziation and determination of carbohydrates.
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This item has been published with the following license: In Copyright