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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 184 (1983), S. 969-976 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyurethanes 6 and 7 based on poly(oxyethylene) (5) were synthesized and investigated for the application as macromolecular chelating agents. 4,4′-Diaminobenzil (3c) and 4,4′-diaminobenzil monoxime (4a) were prepared as monomer precursors in 70 and 80% yield. Copolymers were obtained in yields between 40 and 60% by polyaddition of the corresponding diisocyanates 3d and 4b to poly(oxyethylene) (5) of different chain length and characterized by IR and 13C NMR spectroscopy. The application of the resulting polyurethanes containing functional aromatic block units as polychelatogenes was studied in homogeneous phase by membrane filtration. The metal content was determined in both the filtrate and the retentate and in the case of Ni2+ at different pH values. At pH 2, for example, the molar binding capacity of a polyurethane sample of 6 was 3 times as high as that of 5.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 113 (1983), S. 141-152 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Synthese und Anwendung von mehreren polymeren Agentien auf der Basis von Poly(vinylalkohol), die funktionelle Gruppen mit Phosphor enthalten, wurde untersucht. Die Monomer- und Polymersynthese von Phosphorsäure und ihrer Derivate mit Poly(vinylalkohol) werden beschrieben. Durch polymeranaloge Reaktionen mit Mono- und Diethylestern der Phosphorsäure wurden multifunktionelle Derivate dieses hydrophilen Polymers erhalten. Untersuchungen zu den Komplexbildungseigenschaften der Polychelatogene wurden mit Hilfe der Membranfiltration für Nickel bei verschiedenen pH-Werten durchgeführt. Typische Komplexierungskurven wurden nach Bestimmung des Metallgehalts im Filtrat und Retentat erhalten. Unterschiede der polymeren Träger und Einflüsse der funktionellen Gruppen werden diskutiert.
    Notes: Synthesis and application of several polymeric agents based on poly(vinylalcohol) with phosphorus containing functional groups were investigated. Monomer and polymer syntheses of phosphoric acid and derivaties with poly(vinylalcohol) are described. Multifunctional derivaties of the hydrophilic polymer were obtained by polymer-analogous reactions with mono and diethyl esters of phosphoric acid. Studies on chelating properties of the polychelatogenes at different pH values for nickel were carried out by means of membrane filtration. Metal determination in filtrate and retentate yielded typical chelating curves. Differences of the polymer supports and influences of the functional groups are discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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