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Description:
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The research presented in thesis has three objectives . The first objective was to obtain a synthetic route which would allow the linkage of proton -ionizable crown ethers to commercially available , flinctionalized polystyrene . The proton -ionizable crown ethers used in this research could not be directly attached to chloromethylated polystyrene . Therefore an appropriate intermediate had to be incorporated prior to crown ether attachment .
The second objective was to determine the characteristics of the base resin which allow the greatest degree of alkali metal cation binding . Structural characteristics of the base resin include the degree of crosslinking and extent of chloromethylation . These two factors could play a very significant role in the metal cation sorption ability of the various crown ether -coupled polystyrene resins .
The final objective was to determine if the polymer bound proton -ionizable crown ethers maintained the metal ion binding abilities of the corresponding non -polymeric proton -ionizable crown ethers . |