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  • Polymer and Materials Science  (2)
  • 1975-1979  (2)
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Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 67 (1978), S. 99-116 
    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: The well-known pendulum apparatus for the testing of paints (DIN 53157) has been provided with a heating unit and used for testing polymer materials.The obtained value (PW) turns out to be easily determinable and appropriate for the characterization of viscoelastic properties of polymers as a function of temperature. The results are discussed in connection with those obtained with the torsional pendulum.This paper is intended to stimulate further measurements, discussions and above all to bring up new interpretation possibilities of the results.
    Notes: Das nach DIN 53157 bekannte und der Lackprüfung dienende Pendelgerät wurde für diese Messungen mit einer Heizung versehen und für Untersuchungen an Kunststoffen eingesetzt. Die erhaltene Meßgröße, der Pendelwert, erweist sich als eine geeignete und leicht bestimmbare Größe zur Charakterisierung verschiedener Kunststofftypen und erlaubt eine Beschreibung und Erklärung ihres visko-elastischen Verhaltens in Abhängigkeit von der Temperatur. Die Ergebnisse werden auch im Vergleich mit den Ergebnissen aus freien Torsionsschwingungen diskutiert. Weitere Messungen, Diskussionen und vor allem eine Erweiterung der Interpretation der Ergebnisse sollen durch diese Arbeit angeregt werden.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 50 (1978), S. 905-910 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mode of action and characterization of multifunctional automotive exhaust catalysts. Because of the pending reduction in permissible concentration of toxic components in automotive exhausts the catalysts presently available will have to be replaced by more efficient systems. For these “second generation” catalysts multifunctional platinum/rhodium based catalysts are in the course of development, with provision being made for control of the fuel/air mixture. The new catalysts destroy both NOx as well as carbon monoxide and hydrocarbons and are effective in the neighbourhood of the stoichiometric composition of the fuel/air mixture. The mode of action of the new “three-way” catalysts is described in detail and the present trends in development are outlined.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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