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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 25 (1972), S. 163-169 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Das Brechungsindexinkrement von acht verschieden zusammengesetzten Terpolymeren aus Styrol, Acrylnitril und Methylmethacrylat wurde in Dimethylfoirmamid und in Butanon bestimmt. Aus der infrarotspektroskopisch ermittelten Zusammensetzung der Copolymeren und den Brechungsinkrementen der Homopolymeren wurden die Brechungsinkremente der Terpolymeren berechnet. Das ptrrtielle azeotrope Terpolymere besitzt ein konstantes Brechungsinkrement während der Terpolymerisation, während die aus anderen Monomermischungen erhaltenen Werte sich mit dem Umsatz ändern.
    Notes: The differential refractive index increment was measured for statistical styrene/acrylonitrile/methyl methacrylate terpolymers of eight different compositions in dimethylformamide and in butanone. With the terpolymer composition obtained from infrared absorption and the differential refractive index increments of the homopolymers, the differential refractive index increments of terpolymers are calculated. The partial azeotropic terpolymer gives a constant value in the course of terpolymerization. The differential refractive index increment of a terpolymer synthesized from other monomer feed than the azeotropic composition changes with conversion.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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