Segmental relaxation in a symmetric poly(styrene-b-methylphenylsiloxane)

  • B. Gerharz
  • S. Vogt
  • E. W. Fischer
  • G. Fytas
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 91)


Orientational dynamics in a homogeneous diblock copolymer of polystyrene (PS) and poly(methylphenylsiloxane) (PMPS) with PS composition f PS=0.58 and a single but very broad glass transition temperature T g=303±45 K have been studied by photon correlation (PCS) and dielectric (DS) spectroscopy over the broad temperature range from 273 to 373 K. Two distinct primary relaxation processes associated with the PS-like and PMPS-like segmental dynamics can be resolved by PCS and DS techniques. The corresponding distributions of relaxation times exhibit a broad shape with temperature-dependent breadths.

Key words

Primary relaxation composition fluctuations depolarized Rayleigh scattering dielectric spectroscopy diblock copolymer 


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Copyright information

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

Authors and Affiliations

  • B. Gerharz
    • 1
  • S. Vogt
    • 1
  • E. W. Fischer
    • 1
  • G. Fytas
    • 2
  1. 1.Max-Planck-Institut für PolymerforschungMainzFRG
  2. 2.Foundation for Research and Technology Hellas, HeralkionCreteGreece

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