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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of porous bead cellulose with technical grain size (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 197 (1992), S. 201-206 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Bead cellulose, particle diameter 0.1 - 2.7 mm, was prepared from dispersions of viscose in chlorobenzene by applying the thermal sol-gel transition. Technical viscose containing modifiers Berol Visco 32, Berol Glyco 1540 and Kordamin V was used. The size of cellulose beads can be controlled by means of the amount of oleic acid in the dispersion medium. The optimal result was reached at 5 - 6 mg oleic acid in 90 ml chlorobenzene.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051970117
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  • 2
    Electronic Resource
    Electronic Resource
    Sorbents prepared from a composite reactive carrier based on bead cellulose and poly(ethylenemethacrylate-toluenesulfonate) (1987)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 152 (1987), S. 179-192 
    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: Ein reaktiver Träger vom Composite-Typ, bestehend aus Cellulose-Perlen und Polyethylenmethacrylat toluolsulfonat wurde durch Reaktion mit Na-Sulfit, mit Dimethylaminoethanol, mit Polyethylenimin, mit Thioharnstoff (und anschließende Hydrolyse mit KOH), mit Phenol und Pyrogallol (und anschließende Reaktion mit Quecksilberacetat) modifiziert. Die so hergestellten Träger enthalten folgende funktionelle Gruppen: Sulfonsäure-, quaternäre Ammonium-, Imin-, Mercaptan- und Qecksilberacetat-Gruppen (letztere über Phenol- bzw. Pyrogallolether gebunden). Die Reaktion verläft unter hydrolytischer Abspaltung der reaktiven Toluolsulfonylgruppe. Der Hydrolyseumsatz steigt mit der Wasserkonzentration des Reaktionsmediums und mit der Temperatur. Der höchste Umsatz wurde bei der Thiolgruppe erzielt. Deren Sorptionsvermögen wurde durch Sorption mit Ag+ gemessen. Die hohe Sorptionsgeschwindigkeit wird auf die Hydrophilität der Cellulosekomponente zurückgeführt.
    Notes: A composite reactive carrier consisting of bead cellulose and poly(ethylenemethacrylate-toluenesulfonate) was modified by reactions with sodium sulfite, dimethylaminoethanol, polyethyleneimine, thiourea (followed by hydrolysis with KOH), phenol, and pyrogallol (followed by mercuration with mercury(II) acetate (CH3COO)2Hg) to functional sorbents containing sulfonic, quaternary ammonium, imine, thiol, and Hg+ ion exchange groups. The modification is accompanied by a hydrolytic splitting-off of the reactive tosyl group. The hydrolysis is supported by the presence of water in the reaction medium and its degree increases with the reaction temperature. The highest conversion was reached in the formation of the thiol sorbent. Its sorption properties were investigated by the sorption of Ag+ ions. The observed high rate of sorption is a consequence of the hydrophilizing effect of the cellulose component of the composite sorbent.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1987.051520116
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical transformations of polymers.Presented in part at the IUPAC International Symposium on Macromolecules Aberdeen, September 1973. Part XVII: J. Polym. Sci. C, in press. XVIII. Mercury-complexing polymers with pendent thiol groups. Preparation and medical uses (1975)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 44 (1975), S. 67-75 
    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: Poly(vinyltoluol-α-thiol)und Poly(1-methacryloyl-oxyäthan-2-thiol) werden durch polymeranaloge Hydrolyse der entsprechenden polymeren Isothiuroniumsalze hergestellt. Die Adsorption von Schwermetallen aus Lösungen niedriger Konzentrationen wurde für beide polymeren Thiole untersucht. Die Affinität steigt bei Experimenten in vitro in der Reihe Pb 〈 Ag 〈 Hg an. Bei Experimenten in vivo wurde die Resorption des Quecksilbers im Darmtrakt von Ratten durch das Methacrylatpolymere verhindert, wenn Quecksilberchlorid oder Methylquecksilberchlorid eingesetzt wurde, nicht aber im Falle von Phenylquecksilberchlorid.
    Notes: Poly(vinyltoluene-α-thiol) and poly(1-methacryloyloxyethane-2-thiol) were prepared by the polymeranalogous hydrolysis of the respective polymeric isothiuronium salts. The sorption of heavy metals from low-concentrated solutions was studied for both thiol polymers. Affinity increases in the series Pb 〈 Ag 〈 Hg in experiments in vitro. In vivo the mercury resorption in the gastrointestinal tract of rats was partly blocked by the methacrylate derivative if mercuric chloride or methylmercurichloride was administered (in the case of phenylmercurichloride the polymeric thiol was ineffective).
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1975.050440105
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of pores and gel phase in macroporous ion-exchange resins by means of NMR spectra (1975)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 45 (1975), S. 139-150 
    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 den Kernresonanzspektren von einigen gequollenen makroporösen Kationenaustauschern ist es gelungen, die Signale des Quellungsmittels in den Poren und in der Gelphase aufzulösen. Aus den Signalintensitäten wurde das relative Volumen der Poren im gequollenen Harz bestimmt. Aus den chemischen Verschiebungen der Signale des Quellungsmittels im Gel und in den Poren wurde die innere Molalität und der Vernetzungsgrad der Gelphase bestimmt und die Natur der Poren charakterisiert.
    Notes: In the NMR spectra of some types of swollen macroporous cation-exchange resins the NMR signals of the swelling liquid in the pores and in the gel phase have been resolved. From the intensities of these signals the relative volume of pores in the swollen resin was determined. The chemical shifts of the signals of the liquid in the gel and in the pores were used for the determination of the internal molality and crosslink density in the gel phase, as well as for the characterization of the quality of the pores.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1975.050450110
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of macroporous ion-exchange resins by means of conventional and MAR-NMR spectra (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 38 (1974), S. 129-140 
    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: Durch Vergleich mit MAR-NMR Spektren wurde gezeigt, daß die Form der inneren Wasserbande in NMR-Spektren von makroporösen Kationenaustauschern von der Struktur des Harzes abhängt. In Harzen, die aus relativ großen Mikroteilchen (Größenordnung μ) aufgebaut sind, kann die innere Wasserbande durch kinetische Prozesse verbreitert sein. In aus sehr kleinen Mikroteilchen (Größenordnung 100A) bestehenden Harzen wurde eine weitgehende Heterogenität zwischen einzelnen Perlen entdeckt, die aus den NMR-Spektren quantitativ charakterisiert werden kann.
    Notes: By comparison with MAR-NMR spectra, the shape of the internal water band in conventional NMR spectra of macroporous cation-exchange resins is shown to be characteristic of resin structure. In resins composed of relatively large microparticles (order of microns) the internal water line may be broadened by kinetic process in the resin phase. In resins composed of very small microparticles (hundreds of Å), a considerable inter-particle heterogeneity is revealed and can be quantitatively characterized from NMR spectra.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1974.050380112
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