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  • 1975-1979  (3)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 97 (1975), S. 6272-6274 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 15 (1976), S. 587-588 
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Rheologica acta 15 (1976), S. 654-657 
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zusammenfassung Mit Hilfe eines Schlitz-Düsen-Rheometers werden die Fließkurven und Viskositätsfunktionen eines sternförmigen Butadien-Styrol-Blockpolymerisats bei 160, 180, 200 und 220°C bestimmt. Bei einer kritischen Schubspannung tritt in den Fließkurven ein Übergang auf, der auf eine Modifikation der Schmelzstruktur hindeutet. Die Fließ-Aktivierungsenergie wird mit einer klassischen Schergeschwindigkeits-Temperatur-Superpositionsmethode abgeleitet; der erhaltene Wert macht für das Stern-Polymerisat das Vorhandensein eines Aggregat-Fließmechanismus wahrscheinlich. Austrittsdruck und Eintrittsdruckabfall werden gemessen und zeigen eine Abhängigkeit von der Schlitztiefe.
    Notes: Summary Flow curves and viscosity functions at 160, 180, 200 and 220 °C have been determined for a star-shaped butadiene-styrene block copolymer, by means of a slit die rheometer. At a critical shear stress, a transition occurs in flow curves, which suggests a modification in the melt structure. The flow activation energy is deduced by a classical shear rate—temperature superposition method, and the obtained value suggests an aggregates flow mechanism for the star-shaped product. Exit pressure and entrance pressure drop are obtained and show a dependence on the slit depth.
    Type of Medium: Electronic Resource
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