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  • 1980-1984  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Resacetophenone-formaldehyde resins, I. Metal chelates (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 93 (1981), S. 1-10 
    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: Es werden die Synthese und Eigenschaften eines Resacetophenon (2,4-Dihydroxiacetophenon)-Formaldehyd Harzes beschrieben. Das mittlere Molekulargewicht des Harzes, durch Dampfdruckosmometrie und wasserfreie konduktometrische Titration bestimmt, beträgt 2500 bzw. 2200 g/mol.Von diesem Harz wurden Cu(II)-, Ni(II)- und Co(II)-Chelate hergestellt. Die Elementaranalyse der Chelate ergab ein Verhältnis Metall : Ligand von 1:2. Aus den Reflexionspektren der Chelate konnte geschlossen werden, daß Ni(II)- und Co(II)-Chelate eine tetraedrische Struktur haben, während Cu(II)-Chelate eine quadratisch-ebene Struktur zeigen. Infrarotuntersuchungen zeigen, daß die Metalle über den Sauerstoff der Carbonyl-und Phenolgruppe gebunden sind. Auch die Anwesenheit von Methylenbrücken ist aus den IR-Messungen zu erkennen. Die thermischen Eigenschaften des Harzes und seiner Metallchelate werden diskutiert.
    Notes: Synthesis and properties of a resacetophenone-formaldehyde resin are described. The number average molecular weight of the resin determined by vapour pressure osmometry and nonaqueous conductometric titration is 2500 and 2200 g/mol, respectively.Cu(II), Ni(II) and Co(II) chelates of the resin were prepared. The elemental analysis of chelates indicated a metal to ligand ratio 1:2. From the diffuse reflectance spectra of the chelates it could be concluded that Ni(II) and Co(II) chelates have a tetrahedral structure while Cu(II) chelate has a square planar structure. Infrared spectral studies showed that the metals are co-ordinated through the oxygen of the carbonyl and phenolic groups. The presence of methylene bridges was also indicated from IR spectral studies. The thermal properties of the resin and its metal chelates are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050930101
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Resacetophenone-formaldehyde resins, IIPart I cf. lit.5.. Chelation ion-exchange properties (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 93 (1981), S. 11-17 
    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: Resacetophenon-Formaldehyd-Harze erwiesen sich für verschiedene Metallionen als selektiv komplexierende Ionenaustauscherharze. Zur Bestimmung der Selektivität der Metallionenaufnahme wurde eine Gleichgewichts-batch-Methode angewandt. Die Methode beinhaltet die Messung der Verteilung eines gegebenen Metallions zwischen einer wäßrigen Lösung und dem Harz. Die Untersuchung wurde über einen weiten pH-Bereich und in Medien verschiedener Ionenstärke durchgeführt.
    Notes: The resacetophenone-formaldehyde (RAP-F) resin showed to be a selective chelating ion-exchange resin for certain metal ions. A batch equilibration method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic strengths.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050930102
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Methyl acrylate/N-phenylmaleimide copolymers, 1. Synthesis of copolymers and effect of copolymer composition on huggins constant KH (1982)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 102 (1982), S. 103-108 
    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: In dieser Arbeit wird die Herstellung von Methylacrylat/N-Phenylmaleimid-Co-polymeren verschiedener Zusammensetzung durch radikalische Polymerisation in Cyclohexanon mit Azoisobutyronitril als Initiator untersucht. Die Molenbrüche für N-Phenylmaleimid der vier Copolymeren MP-1, MP-2, MP-3 und MP-4 sind 0,0664,0,2344, 0,3905 und 0,5445. Die Zusammensetzung der Copolymeren wurde durch Elementaranalyse bestimmt. Weiter wird die änderung der Huggins-Konstante KH mit der Zusammensetzung für die Copolymeren in den Lösungsmitteln Dimethyl-formamid, Methylethylketon und Cyclohexanon beschrieben. KH hängt vom Lösungsmittel und von der Zusammensetzung der Copolymeren ab.
    Notes: This paper deals with the synthesis of methyl acrylate/N-phenylmaleimide copolymers having different compositions, (mole fractions of N-phenylmaleimide for the four copolymers MP-1, MP-2, MP-3, and MP-4 are 0.0664, 0.3905 and 0.5445, respectively) by free radical solution polymerization in cyclohexanone using azoisobutyronitrile as an initiator. The compositions of the copolymers have been determined by elemental analysis. The variation of the Huggins constant KH with composition for the copolymers in three solvents, methyl ethyl ketone, dimethylformamide and cyclohexanone is described. KH is found to be dependent both on solvent and composition of the copolymers.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1982.051020111
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Resacetophenoneoxime-formaldehyde resins, IV. Chelation ion-exchange properties (1982)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 105 (1982), S. 75-81 
    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: Resacetophenonoxim-Formaldehyd-Harze erwiesen sich für verschiedene Metallionen als selektiv komplexierende Ionenaustauscherharze. Zur Bestimmung der Selektivität wurde eine Gleichgewichts-batch-Methode angewandt. Die Methode beinhaltet die Messung der Verteilung eines gegebenen Metallions zwischen einer wäßrigen Lösung und dem Harz. Die Untersuchung wurde in einem weiten pH-Bereich und in Medien verschiedener Ionenstärke durchgeführt.
    Notes: Resacetophenoneoxime-formaldehyde resins showed to be selective chelating ion exchange resins for certain metal ions. A batch equilibrium method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic strengths.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1982.051050108
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Free-radical copolymerizations of N-arylmaleimides. II (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 21 (1983), S. 3027-3032 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Free-radical copolymerization of methyl acrylate (MA) with N-p-chlorophenylmaleimide (NPCMI) and N-p-bromophenylmaleimide (NPBMI) initiated by AIBN in cyclohexanone solution at 75°C was studied. The copolymer composition has been determined from the nitrogen content and NMR spectra of the copolymers. The reactivity ratios have been calculated by ML, FR, KT, and JJ methods. Q and e values of NPCMI and NPBMI have also been calculated by the Alfrey-Price Q-e scheme.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.170211017
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  • 6
    Electronic Resource
    Electronic Resource
    Resacetophenone oxime-formaldehyde resin and its metal chelates. III (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 205-212 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In this paper the synthesis and properties of resacetophenone oxime-formaldehyde resin are described. The number-average molecular weights of the resin determined by vapor-pressure osmometry and nonaqueous conductometric titration are 2200 ± 10% and 2500 g/mol, respectively. Cu(II), Ni(II), and Co(II) chelates of the resin were prepared. Elemental analysis of the chelates indicates a metal to ligand ratio of 1:2. The diffuse reflectance spectra and magnetic moments of Ni(II) and Co(II) chelates show tetrahedral structure, whereas Cu(II) chelate shows a square planar structure. Infrared spectral studies show that the metals are coordinated through the nitrogen of the oximino group and oxygen of the phenolic group. The presence of methylene bridges is also indicated by IR spectral studies. The thermal behavior of the resin and its metal chelates are also discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200121
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    Paper (German National Licenses)
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