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  • 1
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The autoxidation of isotactic polypropylene and poly-butylene-1 in solution shows a kinetic difference from that of atactic fractions of these polymers and of polyethylene. Autocatalysis during autoxidation of isotactic fractions is caused by a bimolecular chain initiation step of the hydroperoxides formed whereas that of atactic fractions and of polyethylene is caused by an unimolecular chain initiation step. It is shown that the only reason of this different kinetic behaviour is the difference in tacticity.
    Notes: Die Autoxydation in Lösung von isotaktischem Polypropylen bzw. Polyputylen-1 gehorcht einer anderen kinetischen Beziehung als die entsprechende Autoxydation von ataktischem Polypropylen, Polybutylen-1 und Polyäthylen. Die Autokatalyse der Autoxydation isotaktischer Produkte wird durch einen bimolekularen Kettenstart der gebildeten Hydroperoxyde hervorgerufen, während bei ataktischen Produkten ein monomolekularer Kettenstart beobachtet wird. Die unterschiedliche Kinetik der Autoxydation kann eindeutig auf Taktizitätsunterschiede zurückgeführt werden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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