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  • 1
    Electronic Resource
    Electronic Resource
    Ein neues Modell des rheologischen Verhaltens makromolekularer Flüssigkeiten (1969)
    Springer
    Rheologica acta 8 (1969), S. 339-348 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Summary A mechanical model with five parameters is suggested for describing the rheological properties of macromolecular liquids which consists of aMaxwell element connected in series with aKelvin-Voigt element, the parameter of the dash-pot of theMaxwell element being controlled by theKelvin-Voigt element. This model is tried by means of experimental data known from literature. It is found that the most important properties of the liquids can be described by means of the model at least qualitatively. In particular, it also supplies a „spectrum“ of relaxation times.
    Notes: Zusammenfassung Es wird ein mechanisches Modell mit fünf Parametern zur Beschreibung des Theologischen Verhaltens makromolekularer Flüssigkeiten vorgeschlagen, welches aus einemMaxwell-Element, das mit einemKelvin-Voigt-Element in Reihe geschaltet ist, besteht. Der Parameter des Dämpfers desMaxwell-Elementes wird da-bei durch dasKelvin-Voigt-Element gesteuert. Dieses Modell wird an Hand von aus der Literatur bekannten, experimentellen Daten erprobt. Dabei ergibt sich, daß die wichtigsten Eigenschaften der Flüssigkeiten wenigstens qualitativ mit Hilfe des Modells beschrieben werden können. Insbesondere liefert es auch ein „Spektrum“ von Relaxationszeiten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01973963
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  • 2
    Electronic Resource
    Electronic Resource
    Studies of non-newtonian flow I. Criterion of flow instability (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 2779-2784 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: It is shown that the flow instability of polymer melts occurring above a certain critical shear stress is a direct result of the degree of non-Newtonian behavior of the flowing liquid. Melt fracture, elastic turbulence, and slip-stick effects are a consequence of this instability, which frequently leads to periodic phenomena. The condition for the occurrence of flow instability is derived.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090812
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  • 3
    Electronic Resource
    Electronic Resource
    Reply to “comments on a proposed mechanism of the departure from steady laminar flow in molten polymers” (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 2591-2592 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070111220
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