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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 9 (1985), S. 163-168 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 32 (1981), S. 92-97 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The optimized ROUSE-ZIMM-theory by BIXON and ZWANZIG is used to derive consistently viscoelastic relaxation times of chain models including the hydrodynamic interaction and excluded volume. The intrinsic viscosity is calculated on the basis of these relaxation time spectra.
    Notes: Auf der Basis des von BIXON und ZWANZIG begründeten optimierten ROUSE-ZIMM-Modells werden viskoelastische Relaxationszeiten für Modellketten unter Berücksichtigung des excluded-volume-Effecktes und der hydrodynamischen Wechselwirkung in konsistenter Weise berechnet. Die Eigenviskosität wird auf der Grundlage der Relaxationszeit-spektren berechnet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 652-654 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Ultraschalldämpfung in einer verdünnten Polymerlösung wird im Rahmen der Kirkwoodschen Diffusionsgleichung untersucht. Eine Frequenzabhängigkeit vom Rouse-Zimm-Typ und eine Relation zwischen Scher- und Volumenviskosität werden erhalten.
    Notes: The ultrasonic attenuation in dilute polymer solutions is treated in the framework of the Kirkwood diffusion equation. A Rouse-Zimm type relaxation behaviour of the ultrasonic attenuation results from the calculations, and a relationship between the intrinsic shear and bulk viscosity is derived.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 291-296 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Im Rahmen der BIXON-ZWANZIG-Theorie wird die Dynamißk von Polymerlösungen unter Berücksichtigung voi hydrodynamischen and excluded-volume-Wechselwirkungen konsistent behandelt. Die Ergebnisse bestätigen die wesentlichsten Eigenschaften des “blob” -Bildes, d. h. den Einfluß der nicht-uniformen Ausdehnung der Kette auf die Relaxationszeiten und die Intrinsic-Viskosität, unterscheiden sich im Detail jedoch von den Ergebnissen von DAUD und JANNINK sowie WEILL und DES CLOIZEAUX. Entgegen den Voraussagen wird ein zweites Plateau in [η(ω)] nicht beobachtet.
    Notes: The dynamics of polymer solutions are consistently treated by the BIXON-ZWANZIG theory including both hydrodynamic and excluded volume interactions. The results confirm generally the essential features of the “blob” picture in polymer dynamics, i.e. the influence of non-uniform chain expansion on the relaxation time spectra and the intrinsic viscosity, but differs in detail from results by DAOUD and JANNINK and WEILL and DES CLOIZEAUX. Especially no second plateau in [η(ω)] is observed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 3643-3648 
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Characteristics of gel permeation chromatograms are investigated for three molecular distribution functions assuming a linear relation between elution volume and the logarithm of solute molecular weight. The average molecular weight, Mgpc, determined by the peak position of a chromatogram lies between the Mw and Mn for a polydisperse polymer.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 4227-4234 
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The product gzbZa is weight-averaged over the distribution of molecular species in a polydisperse polymer possessing randomly distributed trifunctional branch points. This permits comparison between branched and nonbranched polydisperse polymers of certain physical properties that depend upon the relative degree of polymerization, z, and upon the ratio of branched to nonbranched molecule mean-square radii, g = Rbr2/Rl2. Values of a, b, and γ (a branching index) are chosen for specific physical reasons and the computed ratios, \documentclass{article}\pagestyle{empty}\begin{document}$ (1 - \gamma )^a \int_0^\infty {g_z ^b z^a } W_z dz/\int_0^\infty {z^{a + 1} e^{ - z} dz} $\end{document} are tabulated. The distribution function for the polydisperse polymer possessing randomly distributed trifunctional branch points is restated in terms of a modified Bessel function of the first kind. This form is of use since properties of the Bessel function are known and the tabulated values of this function are generally available.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 226-229 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Im Rahmen des Edwards-Grant-Modells wird die Ultraschalldämpfung in konzentrierten Polymerlösungen untersucht. Verschlaufungen der Ketten ändern die Frequenzabhängigkeit der Ultraschalldämpfung von ∼ω-1/2zu∼ω-3/4.
    Notes: In the framework of the Edwards-Grant model, the ultrasonic attenuation of concentrated polymer solutions is calculated. Entanglements between the chains change the frequency behaviour of the ultrasonic attenuation from ∼ω-1/2zu∼ω-3/4
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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