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  • Articles: DFG German National Licenses  (1)
  • 1965-1969  (1)
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  • Articles: DFG German National Licenses  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 86 (1965), S. 200-216 
    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: Bei der kationischen Polymerisation substituierter Styrole mit Jod als Initiator steigt die Geschwindigkeitskonstante der Wachstumsreaktion mit der Polarität der verwendeten Lösungsmittel an. Bei der Copolymerisation wird mit zunehmender Polarität des Reaktionsmediums dasjenige Monomere bevorzugt eingebaut, das die geringere Solvatationskraft aufweist. Zur Erklärung dieser Befunde wird angenommen, daß die beim Angriff eines Monomermoleküls erfolgende Abdissoziation des Gegenanions vom Ionenpaar des wachsenden Kettenendes der geschwindigkeitsbestimmende Schritt für die Polymerisation ist.
    Notes: The solvent effect on cationic polymerization of styrene derivatives with iodine as the initiator was studied. It was proved that the propagation constant increased remarkably with the polarity of solvent. In the copolymerization the content of the monomer with less solvating power increased in copolymer as the polarity of the medium increased. It was assumed that the process of the dissociation of the gegen anion of the attacking monomer is predominantly rate-determining in propagation reaction.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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