Solvent reorientation dynamics in Aroclor/polymer solutions

  • A. K. Rizos
  • K. L. Ngai
  • G. Fytas
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)


Dynamic light scattering experiments have been conducted in order to probe the orientational dynamics of the solvent Aroclor (A1248) in solutions containing either 1,2- or 1,4-polybutadiene (PB). The measurements of the orientational time correlation functions C VH(t) were carried out over the temperature range 262–233 K and polymer concentrations of up to 25%. C VH(t) is described by a unimodal distribution of solvent relaxation times near T g and the width of the distribution increases with the addition of the polymer. The solvent reorients faster in the presence of the polymeric solute. These results are described in terms of the Kohlrausch-Williams-Watts (KWW) relaxation function with exponent β=0.64 for A1248, 0.58 for a 20% 1,2-PB (M w=4300)/A1248 solution and discussed in terms of the coupling scheme of relaxation.

Key words

Solvent modification dynamic light scattering coupling model 


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  1. 1.
    Lodge TP, Schrag JL (1984) Macromolecules 17:352CrossRefGoogle Scholar
  2. 2.
    Morris RL, Amelar S, Lodge TP (1988) J Chem Phys 89:6523CrossRefGoogle Scholar
  3. 3.
    Meerwall von D, Amelar S, Smeltzy MA, Lodge TP (1989) Macromolecules 22:295CrossRefGoogle Scholar
  4. 4.
    Fytas G, Rizos A, Floudas G, Lodge TP (1990) J Chem Phys 93:5096CrossRefGoogle Scholar
  5. 5.
    Rizos A, Fytas G, Lodge TP, Ngai KL (1991) J Chem Phys 95:2980CrossRefGoogle Scholar
  6. 6.
    Adams G, Gibbs JH (1965) J Chem Phys 43:139CrossRefGoogle Scholar
  7. 7.
    Nagai KL, Rendel RW, Rajagopal AK, Teitler S (1986) Ann NY Acad Sci 484:150CrossRefGoogle Scholar
  8. 8.
    Rajagopal AK, Ngai KL, Teitler S (1988) J Chem Phys 88:5086CrossRefGoogle Scholar
  9. 9.
    Ngai KL, Rendel RW, Plazek DJ (1991) J Chem Phys 94:3018CrossRefGoogle Scholar
  10. 10.
    Gisser DJ, Ediger MD (1992) Macromolecules 25:1284CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1993

Authors and Affiliations

  • A. K. Rizos
    • 1
  • K. L. Ngai
    • 2
  • G. Fytas
    • 1
  1. 1.Foundation for Research and Technology Hellas and University of Crete Department of Chemistry, HeraklionCreteGreece
  2. 2.Naval Research LaboratoryUSA

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