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  • Polymer and Materials Science  (3)
  • 1960-1964  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Capillary viscometry of molten polycaprolactam (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2195-2212 
    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: A study was made of the rheological behavior of 35 samples of nylon 6 polymers of molecular weights varying from 4,000 to 40,000. A capillary extrusion rheometer was employed, and flow curves extending over a large range of shear rates were obtained. The effect of temperature, shear rate, and molecular weight on viscosity is reported, and some peculiarities of the flow behavior of nylon 6 polymers are discussed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1964.070080517
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Polymerization of vinyl chloride. Molecular weight distribution of polyvinyl chloride during the suspension process (1961)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 43 (1961), S. 12-22 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Von sechs Proben von Polyvinylchlorid, die im Verlauf einer Suspensionspolymerisation entnommen und fraktioniert worden waren, wurden die Verteilungskurven bestimmt. Die Umsatzgrade der Proben lagen zwischen 4% und 94%, die Fraktionierung der Proben wurde mit Tetrahydrofuran-Wasser vorgenommen. Die untersuchten Proben zeigten fast gleiche Verteilungskurven. Die experimentellen Resultate wurden diskutiert.
    Notes: The molecular weight distribution curves of six samples of polyvinyl chloride taken during a suspension polymerization were determined. The degrees of conversion of the samples varied from 4% up to 94%. Fractionations of the samples were carried out in the system tetrahydrofuran-water by fractional precipitation. It appears that the molecular weight distribution does not substantially vary in the course of the polymerization. The experimental results are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1961.020430102
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetic study on the reaction of polyvinyl chloride thermal dehydrochlorination (1960)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 39 (1960), S. 26-38 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Kinetik der thermischen Zersetzung von Polyvinylchlorid bei 180°C. bis 250°C im Stickstoff- und Sauerstoff-Strom an einheitlichen Fraktionen untersucht. Es wird der Einfluß des Molekulargewichts auf die Geschwindigkeit der HCl-Abspaltung beschrieben. In Anwesenheit von Sauerstoff ist die Zersetzungsreaktion autokatalytisch und die Aktivierungsenergie stark erniedrigt. Nach einem Abriß der neueren Literatur wird ein Mechanismus für die HCl-Abspaltung in Stickstoff-Atmosphäre vorgeschlagen.
    Notes: The kinetics of the thermal dehydrochlorination of polyvinyl chloride have been studied in the temperature range 180°C.-250°C. in inert and oxygen-containing atmosphere. The effect of the molecular weight of the polymer on the dehydrochlorination rate is shown. When the thermal degradation occours in presence of oxygen the reaction becomes autocatalytic and the activation energy for dehydrochlorination is strongly lowered (from 33 to 24 Kcal/mole). The literature on the thermal polyvinyl chloride degradation is reviewed and experimental results are discussed and interpreted.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1960.020390103
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