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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 40 (1989), S. 613-618 
    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: Kinetische Untersuchungen der durch Trifluoressigsäure katalysierten Polymerisation von 2-Ethenyl-furan in Methylendichlorid zeigten ein Verhalten von pseudo-zweiter Ordnung mit Abweichungen in Richtung erster oder dritter Ordnung in Abhängigkeit vom Konzentrationsbereich des Initiators. Die Geschwindigkeitskonstante ist direkt proportional der Ausgangskonzentration des Initiators und umgekehrt proportional zur Ausgangskonzentration des Monomers. Während der Polymerisation nimmt die Säurekonzentration infolge der Bildung stabiler polymerer Ionen ab. Weiterhin wird vom Beginn der Polymerisation an eine alkylierung des Furanrings beobachtet. Zur Erklärung der experimentellen Ergebnisse wird ein pseudo-Copolymerisationsmechanismus vorgeschlagen.
    Notes: The kinetic studies of 2-ethenyl furan polymerization in methylene dichloride catalyzed by trifluoroacetic acid, showed a pseudo second order behaviour with deviations to the first or third order in dependence on the concentration range of the initiator. The rate constant is directly proportional to the square of the initial concentration of initiator and inversely proportional to the initial concentration of monomer. During the polymerization the acid concentration decreases as a consequence of the formation of stable polymeric ions. Moreover, the alkylation of furan ring from the beginning of the polymerization is observed. A pseudo-copolymerization mechanism is proposed to justify the experimental results.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 13 (1975), S. 385-390 
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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