ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2007-11-01
    Print ISSN: 0920-5861
    Electronic ISSN: 1873-4308
    Topics: Chemistry and Pharmacology , Physics
    Published by Elsevier
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2005-03-16
    Print ISSN: 0888-5885
    Electronic ISSN: 1520-5045
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 188 (1991), S. 85-96 
    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: Zwei Methoden zur Herstellung hochmolekularer poröser “Bromamine” (—SO2NBr-Na+) mit Poly (styrol-co-divinylbenzol)-Matrix wurden untersucht, und zwar (a) die Einwirkung von Hypobromiten auf das die entsprechenden Sulfonamidseitengruppen enthaltende Copolymere, und (b) die Einwirkung von Bromiden auf das entsprechende hochmolekulare “Chloramin”. In beiden Fällen wurden Metallsalze des hochmolekularen “Bromamins” erhalten. Das Natriumsalz wurde mit einer 100-proz. Ausbeute an funktionellen Gruppen erhalten; es enthielt 2.1 mmol · g-1 —SO2NBr-Na+ Gruppen, d. h. 4.2 meq · g-1 aktives Brom. Es wurde auch die Stabilität des Harzes getestet, und zwar im Bereich von 20-100°C sowohl im trockenen Zustand als auch in wäßrigen Medien. Darüber hinaus wurden thermoanalytische Messungen bis 1000°C durchgeführt. Es wurden auch Beispiele für die Anwendung des“Bromamins” als polymeres Reagenz für Bromierungen (Iodierungen), Oxidationen, Wasserdesinfektion und Kationenaustausch gegeben. Dieses sehr reaktive polymere Reagenz kann ohne merklichen Verlust seiner Eigenschaften wiederholt debromiert und bromiert werden.
    Notes: Macromolecular pendant group N-monobromosulphonamide metal salts —SO2NBr-M+ having a macroporous styrene-divinylbenzene matrix structure have been obtained by two methods:(a) by the action of aqueous metal hypobromites on the appropriate macromolecular pendant group sulphonamide, and(b) by the action of an aqueous metal bromide on the appropriate macromolecular N-chlorosulphonamide metal salt.In each case the sodium salt product was obtained with a 100% functional yield and it contained 2.1 mmol.g-1 —SO2NBr-Na+ groups, i. e., 4.2 meq · g-1 of active bromine. The stability of the resin was investigated in the range 20-100°C in the dry state as well as in aqueous media.A thermoanalysis (TG, DTG, and DTA curves) was carried out up to 1000°C and its course was interpreted. The resin has brominating, oxidative, microbiocidic, and ionexchanging properties. It reacts in a reversible way: after the loss of the active bromine, it can be reactivated again.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 4161-4173 
    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: A number of solid Cationits have been prepared derived from WofatitTrademark, VEB Chemiekombinat Bitterfield. gel and canal structures: styrene/DVB, chloromethylated ST/DVB, and acrylic acid/DVB copolymers. To functionalize the copolymers, PCl3/AlCl3 and dialkyl phosphites or trialkyl phosphites were used. The influence of the polymer matrix structure and the chemical structure of the functional groups of obtained Ionits on their affinity toward 23 metallic cations in acidic media has been investigated using the conductivity method. To obtain comparison data, commercial “Wofatit”-sulfonic and-carboxylic Cationits, have been tested under identical conditions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 169 (1989), S. 119-135 
    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: Ausgehend von einem handelsüblichen makroporösen Sulfonat-Kationenaustauscher wurde über Sulfonylchlorid- und Sulfonamid-Harze ein hochmolekulares Dichloramin mit fast 6 mmol aktivem Chlor pro Gramm des Harzes hergestellt. Die besten Bedingungen für den höchsten Umsatz von Poly(styrol-co-divinylbenzol) sulfonamid (Poly(St-Co-DVB)SO2NH2) zum Dichloramin wurden ermittelt. Es wurde festgestellt, daß die wiederholte Dechlorierung und Chlorierung der Produkte ohne merklichen Abbau abläuft. Es wurde die Beständigkeit im Temperaturbereich von 20-100°C gemessen und zwar sowohl im trockenen Zustand als auch in wäßrigen Medien. Darüber hinaus wurden derivatographische Messungen bis 1000°C durchgeführt. Es werden auch Beispiele für die Anwendung des Dichloramins als polymeres Reagenz für Chlorierungen, Oxidationen von organischen und anorganischen Verbindungen und für die Wasserdesinfektion gegeben.
    Notes: Starting from a commercial sulphonate cation-exchange resin via sulphonyl chloride and sulphonamide resins, a macromolecular dichloroamine with ca. 6 mmol of active chlorine per gram of resin was prepared. The conditions for its optimum preparation starting from poly(styrene-co-divinylbenzene)sulphonamide (poly(St-Co-DVB)SO2NH2) were stated. The possibility of iterated chlorination and dechlorination of the product was proved. Its stability in the range of 20-100°C, both in the dry state and in aqueous media, was determined. Moreover, its derivatographic examinations up to 1000°C were performed. Examples for the use of the macromolecular dichloroamine as a polymer supported reagent for chlorination, oxidation of several organic and inorganic species and water disinfection are given.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 59 (1987), S. 178-179 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...