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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 2605-2616 
    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: Depending on the reaction conditions the ring opening polymerization of cyclopentene in the presence of organometallic catalysts composed of tungsten hexachloride, ether, and tin tetraalkyls yields poly(1-pentenylene) (polypentenamers) with 95% cis and 80% trans double bonds, respectively.Experiments with preformed catalyts indicate, that the microstructure of the polymers is determined by two different active species. The two species are characterized by the conditions of formation and their activity in polymerization. A complex structure for the two active species is proposed.
    Notes: Die ringöffnende Polymerisation von Cyclopenten mit metallorganischen Mischkatalysatoren aus Wolframhexachlorid, Äther und Zinntetraalkyl ergibt je nach den Reaktionsbedingungen Poly(1-pentenylen) (Polypentenamere) mit 95% cis-oder 80% trans-Doppelbindungen.Versuche mit präformierten Katalysatoren zeigen, daß die Mikrostruktur der Polymeren durch zwei verschiedene aktive Spezies bestimmt wird. Für die beiden Spezies werden die Bildungsbedingungen und Reaktionen beschrieben und eine Komplexstruktur vorgeschlagen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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