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  • 1
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Mechanismus der kationischen Polymerisation von Lactonen in Gegenwart hydroxylhaltiger Verbindungen (Hydroxomechanismus) wurde am Beispiel der Polymerisation von β-Propiolacton, ε-Caprolacton, Glycolid und Lactid untersucht. Bei diesem Mechanismus erfolgt das Kettenwachstum über eine vorhergehende Kettenübertragung auf das Monomer. Diese Übertragungsreaktion beschleunigt den Prozeß, verringert die rel. Molekülmasse des Polymers, verschmälert die Molekülmassenverteilung und erhöht die allgemeine Stabilität des Systems.
    Notes: The mechanism of cationic polymerization of lactones in the presence of hydroxyl-containing compounds (hydroxomechanism) has been studied taking as an example the polymerization of β-propiolactone, ε-caprolactone, glycolide and lactide. In this mechanism chain propagation proceeds via preliminary chain transfer to the monomer. This transfer accelerates the process, decreases the molecular weight of the polymer, narrows the molecular-mass distribution and enhances the general stability of the system.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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