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  • Articles  (10,938)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 144 (1955), S. 1-2 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 2
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    Electronic Resource
    Springer
    Colloid & polymer science 144 (1955), S. 58-74 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Es werden die reaktionskinetischen Differentialgleichungen für die als Kondensationspolymerisation aufgefaßte Bildung des Poly-ε-caprolactams unter Berücksichtigung der Umamidierungsreaktionen aufgestellt. Mit den in der 5. Mitteilung wiedergegebenen kinetischen Versuchsdaten über die Polymerisation vonε-Caprolactam bei 220° C mit Wasser und mitε-Aminocapronsäure wird auf der Grundlage der entwickelten Kondensationsvorstellung eine reaktionskinetische Analyse durchgeführt. Es ergibt sich, daß die Versuchsdaten die Theorie in einem weiten zeitlichen Bereich erfüllen, wenn gewisse Einzelreaktionen als durch Endgruppen katalysiert angesehen werden. Auch die in Gegenwart des Einbaukatalysatorsε-Aminocapronsäure ablaufende Polymerisation fügt sich zwanglos in die Theorieein. Für sämtliche Einzelreaktionen werden die kinetischen Reaktionskonstanten angegeben. Unterhalb der Kettenzahlmaxima treten zwischen Experiment und Theorie Differenzen auf. Diese werden insbesondere an Hand des Verlaufes der Aminocapronsäurekonzentrationen diskutiert. Es wird gezeigt, daß diese Differenzen dadurch erklärt werden können, daß sich die Werte der Reaktionskonstanten auf Grund der großen Viskositätsänderung des Reaktionsmediums in diesen Bereichen absolut und teilweise auch relativ zueinander ändern werden.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 144 (1955), S. 107-110 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Für Lösungen von vier verschiedenen Proben von chloriertem Kautschuk in Tetrachlorkohlenstoff wurden Messungen der Depolarisation und der Lichtstreuung durchgeführt. Größe, Gestalt und Molekulargewicht wurden unter Verwendung der Theorien der Lichtstreuung von Gans, Vrklajan, Katalinic und Debye abgeleitet. Die Stärke des Abbaues, dem die Kautschukmoleküle bei der Chlorierung unterworfen sind, wurde abgeschätzt.
    Notes: Summary Measurements have been made of the depolarisation factorsϱ u ,ϱ v ,ϱ h, and the intensity of scattering in the horizontal transverse direction, in the case of solutions of four different samples of chlorinated rubber in carbon tetrachloride. The size, shape and molecular weight of the micelles have been deduced by the application of the light scattering theories of Gans, Vrklajan and Katalinic and Debye. The extent to which the degradation of the rubber molecule occurs on chlorination has also been assessed.
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  • 4
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    Springer
    Colloid & polymer science 144 (1955), S. 168-170 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 5
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    Springer
    Colloid & polymer science 144 (1955), S. 180-182 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 6
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    Springer
    Colloid & polymer science 144 (1955), S. 189-190 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 7
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    Springer
    Colloid & polymer science 144 (1955), S. 188-189 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 8
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    Springer
    Colloid & polymer science 144 (1955), S. 191-192 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 9
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    Springer
    Colloid & polymer science 140 (1955), S. 165-166 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 10
    Electronic Resource
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    Springer
    Colloid & polymer science 140 (1955), S. 168-192 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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