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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 589-589 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The kinetics of rapid coagulation have been studied theoretically. Each particle is assumed to be surrounded by a sphere of attraction having a radius r. If the centre of a second particle penetrates into this sphere of attraction, the two coalesce irreversibly. Treating the problem as one of ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 40 (1977), S. 271-278 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 43 (1978), S. 734-738 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica 16 (1950), S. 577-598 
    ISSN: 0031-8914
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica 18 (1952), S. 915-920 
    ISSN: 0031-8914
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica 16 (1950), S. 851-860 
    ISSN: 0031-8914
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 23 (1957), S. 233-240 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Dielectric properties and loss factors have been measured for dilute solutions of polyvinyl chloride in tetrahydrofuran and mixtures of this solvent with heptane, for solutions of polymethyl methacrylate in benzene and toluene, and for solutions of polyvinyl acetate in toluene. Concentrations varied from 0.5 to 8 g./100 ml. Frequencies ranged from 0.01 to 35 megacycles/sec., and temperatures from -35° to +25°C.Only one sample of polyvinyl chloride was used (DP = 1,750), but six fractions of methyl polymethacrylate (DP = 240 - 12,500) and four of polyvinyl acetate (DP = 2,550-23,250). Numerical values for the three polymers were rather similar. The root mean square dipole moments were proportional to the square root of DP. Relaxation times were practically independent of DP.
    Notes: Les propriétés diélectriques et les facteurs de perte ont été mesurés pour des solutions diluées de chlorure de polyvinyle dans le tétrahydrofurane et des mélanges de ce solvant avec l'heptane, pour des solutions de polyméthacrylate de méthyle dans le benzène et le toluène, et pour des solutions d'acétate de polyvinyle dans le toluène. Les concentrations variaient de 0.5 à 8 g./100 ml. Les fréquences allaient de 0.01 à 35 mégacycles/sec. et les température de -35° à +25°C. Un seul échantillon de chlorure de polyvinyle a été utilisé (DP = 1750); par contre quatre fractions de polyméthacrylate de méthyle (DP = 240-12.500) et quatre d'acétate de polyvinyle (DP = 2.550-23.250) ont été utilisées. Les valeurs numériques des trois polymères étaient plutǒt similaires. Les moments dipolaires moyens étaient proportionnels à la carrée du DP. Les temps de rélaxation étaient pratiquement indépendants du DP.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 30 (1958), S. 105-118 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In this paper the influence of different molecular parameters on the dielectric characteristics of amorphous high polymers has been examined. The dielectric behaviour has been compared for several polymers which carry the same dipole in the side chain, but which differ in the flexibility of the main chain (polymethyl acrylate and polymethyl methacrylate) and in the steric hindrance of the side group (methyl, ethyl, butyl, and isobutyl polymethacrylate). Two dispersion zones have been found in the case of polymethyl methacrylate. These may be attributed to the motions of the segments of the main chain and those of the side chains. For each polymethacrylic ester and in the range of frequencies used in these experiments, only one dispersion zone has been found. The experimental results show that it must be attributed to motions of the side groups, which occur simultaneously with the deformations of the main chain. The observed dielectric dispersion do not seem to be of the same nature as those shown by the study of the mechanical properties. The observed dispersions in high polymeric systems probably have their origin in complexes and various molecular motions which need further investigation.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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