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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 170 (1989), S. 137-143 
    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: Die vorliegende Arbeit untersucht das linear-elastische Bruchverhalten von (PMMA) mit Poly(ethylen-co-vinylacetat) (EVA) oder EVA  -  g-Bernsteinsäureanhydrid (EVA-g-SA) mittels Kerbschlagzähigkeitsmessungen nach Charpy. Rasterelektronenmikroskopaufnahmen zeigen, daß in Blends, die durch „in situ“-Polymerisation des acrylischen Monomeren in Gegenwart des Elastomeren hergestellt wurden, eine IPN-Morphologie vorliegt, während ein Blend, das durch Mischung der Polymerkomponenten im Schmelzezustand gebildet wurde, die typische zweiphasige Struktur von dispergierten Elastomerdomänen in einer glasartigen Matrix zeigt.Die Ergebnisse der mechanischen Messungen stimmen gut mit den beobachteten Morphologien überein.
    Notes: In the present work blends between poly(methylmethacrylate) (PMMA) and poly(ethylene-co-vinylacetate) (EVA) or its derivative EVA-g-succinic anhydride (EVA-g-SA) have been investigated by linear elastic fracture mechanics (LEFM) with Charpy impact tests and by scanning electron microscopy (SEM). Blends prepared by “insitu” radical polymerization of the acrylic monomer in the presence of the rubbers have an IPN morphology, while a blend prepared by melt-mixing the polymer components shows the typical biphasic structure of rubbery domains dispersed in a glassy matrix.Furthermore, a different behaviour is found when using EVA-g-SA instead of EVA. A fair agreement is found between the response of the LEFM analysis applied to the results of Charpy impact tests and the observed morphologies.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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