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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 6 (1951), S. 157-162 
    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: Die Lichtzerstreuung und die Viscosität geben uns die Möglichkeit, die Raumerfüllung der Makromoleküle in Lösung zu berechnen. Diese Berechnungen, die auf Grund verschiedener Theorien vorgenommen werden können, müßten zum gleichen Ergebnis führen. Das ist jedoch am Beispiel einer undissoziierten Polyacrylsäure durchaus nicht der Fall. Man muß daraus schließen, daß mindestens eine der Theorien modifiziert werden muß.
    Notes: La diffusion de la lumière et la viscosité, interprétées par plusieurs théories, nous donnent la possibilité de calculer l'encombrement spatial de la macromolécule en solution. Les données calculées devraimt être concordantes. Mais la comparaison de la valeur de eet encombrement, obtenue à partir de ces théories dans le cas d'un échantillon d'acide polyacrylique non ionisé, nous conduit à un grand désaccord. Une des théories au moins doit être modifiée.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 2 (1947), S. 90-100 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The phase separation in solutions of high polymers in the same solvent (technically known as incompatibility) has been studied for fourteen high polymers (cellulose, vinyl, and acrylic derivatives) dissolved in thirteen solvents. The influence of solvent, concentration, molecular weight and constitution of the macromolecules has been studied for 78 mixtures: the results are represented in triangular diagrams. Incompatibility appears to be the normal situation, compatibility the exception. Moreover, in cetain cases the exception may be only apparent. Phase separation is discussed in its relation to osmotic pressure, solubility, and the isomorphism of the molecules. Phase separation furnishes new means - useful at leat for technical research - of measuring the molecular weight of macromolecules. It is a simple and rapid procedure.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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