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  • Electronic Resource  (2)
  • 33.90. + h  (1)
  • Chemistry  (1)
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  • Electronic Resource  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 36 (1996), S. 239-248 
    ISSN: 1434-6079
    Keywords: 34.20.Cf ; 31.15. − p ; 33.90. + h
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using almost degenerate perturbation theory the calculation of long range limits of alkali-metal dimer molecular states which dissociate to the atom pairs S1/2-P1/2, 3/2 and S1/2-D3/2, 5/2 is presented. Hund's coupling casec is adopted. The calculation includes correlations up to the second order of perturbation theory and exchange energy contributions. The results are expressed in a simple analytical form in terms of dispersion coefficients.
    Type of Medium: Electronic Resource
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  • 2
    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 Emulsionspolymerisation und -copolymerisation von Styren mit und ohne Emulgator sowie mit und ohne Saatlatex wurde untersucht. Die Saatlatices wurden durch Emulsionspolymerisation ohne Emulgator (bei Polystyren) bzw. in Gegenwar eines anionischen Emugators (bei Polybutadien und Butadien-α-Methylstyren-Copolymer) hergestellt. Die kinetischen Untersuchungen und Teilchengrößenbestimmungen zeigten die entscheidende Bedeutung der Verteilung der Emulgatormoleküle und der polaren Gruppen in der Polymer-Wasser-Grenzfläche für den Teilchenbildungsprozeß.
    Notes: The emulsion polymerization and copolymerization of styrene with or without emulsifiers, seeded or not, was investigated. The seed latex was prepared by emulsion polymerization without emulsifiers (for polystyrene), or in the presence of anionic emulsifiers (for polybutadiene and butadiene-α-methyl-styrene copolymer). The kinetic studies and particle size measurements proved the crucial role of the distribution of emulsifier molecules and of the polar groups at the polymer-water interface on particle formation.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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