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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 83-87 
    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: The diade distribution of copoly(l,3-dioxacyclanes) synthesized by cationic ring-opening polymerization at 293 K in toluene (initiator HClO4) was studied by 1H-NMR analysis. As a result sequence lengths of a typical statistic copolymer were found. Therefore, the calculation of sequence lengths from copolymerization parameters is not allowed. Copolymers Synthesized by step-polymerization have also statistic sequence lengths. These facts are attributed to by-reactions.
    Notes: Mit der 1H-NMR-Spektroskopie wird die Diadenverteilung von Copoly(1,3-dioxacyclanen), die durch kationische Ringöffnungspolymerisation bei 293 K in Toluen (Initiator HClO4) ehalten wurden, untersucht. Es werden für statistische Copolymere typische Sequenzlängen gefunden. Die Berechnung der Sequenzlängen aus den Copolymerisationsparametern ist unzulässig. Durch Stufenpolymerisation hergestellte Copolymere weisen ebenfalls statistische Sequenzlängen auf. Diese Tatsachen werden auf Nebenreaktionen zurückgeführt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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