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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 156 (1972), S. 297-310 
    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 polymerization of acrylonitrile, methyl acrylate, methyl methacrylate, α-chloromethyl acrylate and α-bromo methyl acrylate in dimethylformamide has been investigated using α.α′-azobisisobutyronitrile as initiator. The following relations have been derived at 60°C: for methyl acrylate v = 15.15·10-4·[I]0.5·[M], for methyl methacrylate v = 3.46·10-4·[I]0.5·[M], for α-chloro methyl acrylate v = 5.25·10-4·[I]0.5·[M], and for α-bromo methyl acrylate v = 4.12·10-4·[I]0.5·[M]. It has been found that (kp/kt0.5)60 is 14.4·10-2 for α-chloro methyl acrylate and 12.15·10-2 for α-bromo methyl acrylate. The relation between the kinetic data obtained and the HAMMETT σp constants has been discussed for the substituents in α-position to the double bond which are considered to be the characteristic parameters for the chemical structure of the monomers.
    Notes: Die Polymerisation von Acrylnitril, Methylacrylat, Methylmethacrylat, α-Chlor-methylacrylat und α-Brom-methylacrylat wurde in Dimethylformamidlösung mit α.α′-Azobisisobutyronitril als Initiator untersucht. Dabei ergaben sich für eine Temperatur von 60°C folgende Beziehungen: Für Methylacrylat v = 15,15·10-4·[I]0,5·[M], für Methylmethacrylat v = 3,46·10-4·[I]0,5·[M], für α-Chlor-methylacrylat v = 5,25·10-4·[I]0,5·[M] und für α-Brom-methylacrylat v = 4,12·10-4·[I]0,5·[M]. Es wurde gefunden, daß (kp/kt0,5)60 für α-Chlor-methylacrylat 14,4·10-2 und für α-Brom-methylacrylat 12,15·10-2 beträgt.Der Zusammenhang zwischen den erhaltenen kinetischen Daten und den HAMMETT-Konstanten σp für die Substituenten in α-Position zur Doppelbindung als die für die chemische Struktur der Monomeren bezeichnenden Parameter wurde erörtert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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