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  • Polymer and Materials Science  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Metal complexation of poly[1-(2-hydroxyethyl)aziridine-co-2-methyl-2-oxazoline]Systematic name: Poly[(acetylimino)ethylene-co-(2-hydroxyethyleneimino)ethylene]. in aqueous solutionDedicated to Prof. Esen A. Bekturov on the occasion of his 60th birthday (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 197 (1992), S. 107-115 
    Details
    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 Metallkomplexierung von wasserloslichem Poly[1-(2-hydroxyethyl)aziridin-co-2-methyl-2-oxazolin] mit Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(II) und Sr(II)-Ionen wurde in wäßriger Phase mit der Methode der Liquid-Phase Polymer-Based Retention (LPR) untersucht. Die Studie zeigt, daß alle Metallionen, außer Co(II) und Zn(II), bei pH 5 komplexiert wurden. Im Gegensatz zu Sr(II), das nur eine schwache Wechselwirkung in einem pH-Bereich von 3 bis 7 zeigte, wurden bei pH 7 94% Co(II) und 88% Zn(II) retentiert. Bei pH 3 zeigten nur Cu(II) und Cr(III) eine Wechselwirkung mit dem Polymeren, wobei die Retentionswerte 76% für Cu(II) und 52% für Cr(III) betrugen. Viskositätsmessungen des Copolymeren in Gegenwart von Metallionen wurden bei verschiedenen pH-Werten durchgeführt.
    Notes: The metal complexation of water-soluble poly[1-(2-hydroxyethyl)aziridine-co-2-methyl-2-oxazoline] with Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(II), and Sr(II) ions was investigated in aqueous phase using Liquid-Phase Polymer-Based Retention (LPR). The study shows that all metal ions are complexed at pH 5, except Co(II) and Zn(II). In contrast to Sr(II), which showed only a slight interaction over a pH range of 3 to 7, 94% of Co(II) and 88% of Zn(II) were retained at pH 7. At pH 3, only Cu(II) and Cr(III) ions interacted with the copolymer with retention values of 76% for Cu(II) and 52% for Cr(III). Viscosimetric measurements of the copolymer were performed in the presence of metal ions at different pH values.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051970109
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  • 2
    Electronic Resource
    Electronic Resource
    Poly[1-(2-hydroxyethyl) aziridine] as polychelatogen for liquid-phase polymer-based retention (LPR)Dedicated to Prof. Ernst Bayer on the occasion of his 65th birthday (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 193 (1991), S. 195-203 
    Details
    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 Eigenschaften von Poly[1-(2-hydroxyethyl) aziridin] wurden im Hinblick auf die Komplexbildung für die Metalle Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(II) und Sr(II) in wäßriger Lösung untersucht. Die LPR-Methode beruht auf der Retention von anorganischen Ionen durch lösliche Polymere in einer Membran-Filtrationszelle und nachfolgender Abtrennung der niedermolekularen Anteile vom gebildeten Polymerkomplex. Die Wechselwirkung des hydrophilen Polymeren wurde als Funktion von pH und Filtrationsfaktor bestimmt. Nach dem erhaltenen Wechselwirkungsmuster bildet Cu(II) die stabilsten Komplexe mit dem Polyaziridin innerhalb des pH-Bereiches von 3 bis 7. Bei pH 3 ist es möglich, Cu(II) von allen anderen Metallionen zu trennen. Sr(II) wird im ganzen untersuchten pH-Bereich nur schwach retentiert. Bei pH 7 traten alle Metalle, außer Sr(II), mit dem Polymeren in Wechselwirkung und wurden nahezu quantitativ retentiert.
    Notes: The metal complexing properties of poly[1-(2-hydroxyethyl) aziridine] for the metals Co(II), Zn(II), Ni(II), Cu(II), Cr(III), Fe(III), Cd(II), Pb(II), and Sr(II) in aqueous phase were investigated. The LPR method is based on the retention of inorganic ions by soluble polymers in a membrane filtration cell and subsequent separation of low-molecular species from the polymer complex formed. The metal interaction with the hydrophilic polymer was determined as a function of pH and filtration factor. According to the interaction pattern obtained, Cu(II) forms the most stable complexes with the polyaziridine within the pH range 3 to 7. At pH 3, it is possible to separate Cu(II) from all other metal ions. Sr(II) is only slightly retained at the pH range investigated. At pH 7, all elements, except Sr(II), did interact with the polymer and were almost quantitatively retained.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051930118
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  • 3
    Electronic Resource
    Electronic Resource
    Copolymerization via zwitterion, 8Part 7: Cf.15.. β-butyrolactone and 2-ethyl-2-oxazoline (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 149-154 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 2-Ethyl-2-oxazoline (ETOX) as nucleophilic monomer and β-butyrolactone (BUL) as electrophilic monomer were copolymerized in bulk in the absence of initiator at 45°C. Copolymers were characterized by elemental analysis, IR, 1H NMR, and 13C NMR spectroscopy. The copolymer composition was determined by elemental analysis and by 1H NMR spectroscopy. All copolymers contain a BUL:ETOX mole ratio greater than one.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880113
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  • 4
    Electronic Resource
    Electronic Resource
    Spontaneous copolymerization of 1-(2-hydroxyethyl)aziridine with β-butyrolactone, 14Part 13: cf.15. (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 190 (1989), S. 2665-2672 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The copolymerization of 1-(2-hydroxyethyl)aziridine (1) as nucleophilic monomer with β-butyrolactone (2) as electrophilic monomer without initiator in solution at 45°C was investigated. Copolymers were characterized by IR and 1H NMR spectroscopy. By elemental analyses it could be shown that their compositions depend on the monomer ratio in the feed. From the copolymer composition and 1H NMR spectra it was possible to suggest four probable copolymer structures.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.021901030
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  • 5
    Electronic Resource
    Electronic Resource
    Copolymerization via zwitterion, 5Part 4: Cf.6.. β-butyrolactone and 2-methyl-2-oxazoline (1986)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 187 (1986), S. 71-79 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The zwitterionic copolymerization of 2-methyl-2-oxazoline (MOX) as nucleophilic monomer with β-butyrolactone (BUL) as electrophilic monomer was investigated in bulk and in solution (CH3CN) at 45°C. The copolymer composition was around 1,5/1,0 (BUL/MOX) as was established by 1H NMR. 1H and 13C NMR spectroscopy were used to identify the copolymers. The IR spectroscopy supported the NMR results. On the other hand, the copolymers behave as polyelectrolytes, according to viscosity determinations. A copolymerization mechanism through a zwitterion species is suggested.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1986.021870107
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  • 6
    Electronic Resource
    Electronic Resource
    Branched poly(ethylene imine) support for resins with retention properties for heavy metal ions (1993)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 211 (1993), S. 103-112 
    Details
    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: Polyethylenimin wurde mit Epichlorhydrin vernetzt und anschließend zu den entsprechenden N-Methyl-, N-Carboxymethyl- und N-Phosphonomethyl_Derivaten umgesetzt. Die Sorptionseigenschaften der funktionalisierten Harze für die Aufnahme von Cu(II)-, Fe(II)-, Fe(III)- und Urany-(UO22+)-Ionen aus wässeriger Lösung wurden untersucht. die Aufnahme von Fe(II), Fe(III) und Cu(II) bei pH 1 ist bei Harzen mit tertiären Amin-oder Ammoniumgruppen vernachlässigbar, während U(VI) leicht aufgenommen und mit Natriumcarbonatlösung ebenso leicht wieder eluiert wird.
    Notes: A crosslinked poly(ethylene imine), using epichlorohydrin as crosslinker, was prepared and subsequently modified in order to obtain the corresponding N-methylated, N-carboxymethylated and N-phosphonomethylated derivatives. The sorption characteristics of these functionalized resins were studied by a batch equilibration technique, for uptake of Cu(II), Fe(II), Fe(III) and uranyl ions from aqueous solution. Resins with tertiary amine or ammonium groups show negligible sorption for Fe(II), Fe(III) and Cu(II) at pH 1, in contrast with high sorption for U(VI), which is readily eluted with sodium carbonate.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1993.052110109
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  • 7
    Electronic Resource
    Electronic Resource
    Chelation properties of polymer complexes of poly(acrylic acid) with poly(acrylamide), and poly(acrylic acid) with poly(N,N-dimethylacrylamide) (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1153-1160 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The metal-complexing properties of intermolecular complexes of poly(acrylic acid) with poly(acrylamide), and poly(acrylic acid) with poly(N,N-dimethylacrylamide) were studied by means of the liquid-phase polymer based retention (LPR) technique. The metal ion retention ability at pH 5 for 400 μg of Cu(II), Cd(II), Co(II), Cr(III), Hg(II), Ni(II), Pb(II), and Zn(II) was investigated due to their environmental and analytical interest in the presence of 1.1 M of carboxylic acid units and variable amounts of amide groups. The retention profiles of the intermolecular complexes were compared with those of the correspondent homopolymers and copolymers. The retention capacity of poly(acrylic acid) is 100% for all metal ions except for Co(II), Ni(II), and Zn(II) whose values were about 90%, while poly(acrylamide) does not retain any of the metal ion studied. The presence of poly(acrylamide) decreases the retention capacity down to 60% for Co(II) and Ni(II) and to 70% for Zn(II). The decrease on the retention values is dependent on the polymer ratio. A smaller effect is observed by the addition of poly(N,N-dimethylacrylamide) which also decreases the retention capacity down to 80% for Co(II) and Ni(II) for a ratio poly(acrylic acid)/poly(N,N-dimethylacrylamide) = 1/2. The metal ion binding behavior of the interpolymer complexes is very close to that of the copolymers.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and properties of hydrophilic polymers, 6.Part 5: cf. ref.17 Water-soluble polypyrrole graft copolymers with electrical conductivity (1997)
    Weinheim : Wiley-Blackwell
    Macromolecular Rapid Communications 18 (1997), S. 503-508 
    Details
    ISSN: 1022-1336
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A novel method for the preparation of water-soluble polypyrrole graft copolymers with polyamines or polyimines is described. The polyreaction is performed in acidic solution by using chemical oxidants, e.g. iron(III) chloride or ammonium peroxodisulfate. The graft copolymers showed electrical semiconductivity in the undoped state which can be placed between the high conductivity of polypyrrole and the nonconductivity of the polyimine. Their thermal stability at 250°C is improved compared to polypyrrole. The novel graft copolymers are soluble in water over a wide pH range and have a good processability.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1997.030180608
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  • 9
    Electronic Resource
    Electronic Resource
    Poly[N-(2-hydroxyethyl)ethyleneimine-co-(1,2,3,6-tetrahydrophthalic anhydride)] by spontaneous copolymerization (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2293-2299 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The copolymerization of 1,2,3,6-tetrahydrophthalic anhydride (THPhA) as electrophilic monomer and N-(2-hydroxyethyl)ethyleneimineSystematic name: N-(2-hydroxyethyl)aziridine. as nucleophilic monomer in acetonitrile without initiator was investigated. The copolymers show low incorporation of THPhA in the main chain and preferential incorporation in the side chain by esterification reaction of the hydroxymethyl group. On the basis of the spectroscopic data a copolymer structure is proposed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and properties of hydrophilic polymers. III. Ligand effects of the side chains of polyaziridines on metal complexation in aqueous solution (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 60 (1996), S. 2191-2198 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The metal-complexing properties of five different polyaziridines - poly[1-(2-aminoethyl)aziridine], poly(1-acetylaziridine), poly[1-(2-hydroxyethyl)aziridine], poly[1-(2-hydroxyethyl)aziridine-co-1-acetylaziridine], and poly[1-(2-aminoethyl)aziridine] oxine - were investigated in an aqueous solution with regard to the side-chain effects using membrane filtration. The results are discussed and compared with the stability constants of metalcomplexation of the corresponding functional moieties. Poly[1-(2-aminoethyl)aziridine], a poly(aziridine) with neutral nitrogen donors in the side chains, showed similar complexing properties to those of ammonia. The only exceptions are Fe(III) and Cr(III), which cannot form complexes with ammonia but can be retained in the membrane filtration process due to the formation of Fe(III)-colloidal species and hydroxides. The complexing properties of polyaziridines containing hydroxyl groups in the side chains (i.e., poly[1-(2-hydroxyethyl)aziridine] and poly[1-(2-hydroxyethyl) aziridine-co-1-acetylaziridine] can be explained and described by the formation constants with the corresponding hydroxides. The introduction of a carbonyl moiety in the polyaziridine side chain, e.g., polyacetylaziridine, reduces the complexing ability for metal ions because the carbonyl group cannot form complexes with the metal ions investigated. Poly[1-(2-aminoethyl)aziridine]oxine showed the strongest complexing ability in the series of metal ions due to the strong complexing ligand 8-hydroxy quinoline attached to the polymer backbone. © 1996 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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