Internal Motion in Polystyrene

  • Gwynne Jones
  • David Caroline
Part of the Nato Advanced Study Institutes Series book series (NSSB, volume 23)


The photon-correlation function of light scattered by monodisperse high molecular weight polystyrene (\(\overline{M}_{\omega} = 8.7 \times 10^{6},\;\overline{M}_{\omega}/\overline{M}_{n} < 1.03\)) in butan-2-one at 25°C has been measured as a function of scattering angle θ, and an accurate value obtained for the relaxation time associated with the first mode of internal motion of the molecule. In previous investigations of internal motion by Huang and Frederick1 and McAdam and King2, the samples had polydispersity indices of around 1.3, which would have made it difficult to distinguish unambiguously between the effects of internal motion and polydispersity on the correlation function.


Relaxation Time Correlation Function Photon Correlation Spectroscopy Chem Phys Polydispersity Index 
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  1. 1.
    Wu-Nan Huang and J.E. Frederick, Macromolecules, 7, 34 1974.ADSCrossRefGoogle Scholar
  2. 2.
    J.D.G. McAdam and T.A. King, Chem Phys., 6, 109 1974.CrossRefGoogle Scholar
  3. 3.
    Yukiko Tagami and R Pecora, J Chem Phys., 51, 3293 1969.ADSCrossRefGoogle Scholar
  4. 4.
    P.E. Rouse, J Chem Phys., 21, 1272 1953.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • Gwynne Jones
    • 1
  • David Caroline
    • 1
  1. 1.School of Physical and Molecular SciencesUniversity College of North WalesBangor, GwyneddUK

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