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  • 1
    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: The redoxreaction H2O2-rongalite was investigated in the presence of catalytic amounts of iron. Radicals responsible for initiation of polymerization are produced only when at least traces of heavy metals are available. For the above reaction iron is the most effective one. Reaction rates for the consumption of H2O2 and rongalite with respect to complexbound and free iron, without and with the addition of acrylonitrile, are provided. A scheme of reactions is being presented which helps to unterstand the reaction rates, reaction products aldehyde bisulphite and sulphate, as well as the mode and degree of polymerization.
    Notes: Die Redoxreaktion H2O2/Rongalit läuft nur dann über Radikale ab, die die Polymerisation starten, wenn Schwermetalle zumindest in Spuren vorhanden sind. Am wirksamsten ist Eisen. Die Zeitgestze für den Umsatz von H2O2 und Rongalit in Abhängigkeit von komplexgebundenem und freiem Eisen ohne und mit Zusatz von Acrylnitril werden ermittelt. Ein Reaktionsschema wird angegeben, das die Zeitgesetze, die Umsetzungsprodukte Aldehydbisulfit und Sulfat, sowie Ablauf und Grad der Polymerisation verstehen läßt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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