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Broadband dielectric spectroscopy on the molecular dynamics in polymer model-systems: polyphenylmethylsiloxane and linear and star-branched poly(cis-1,4-isoprene)

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Relaxation in Polymers

Part of the book series: Progress in Colloid & Polymer Science ((PROGCOLLOID,volume 80))

Abstract

Broadband dielectric spectroscopy (10−1 Hz - 109 Hz) is employed to study the molecular dynamics in polymer model-systems. For poly(methylphenylsiloxane) the measured molecular dynamics is compared with the collective dynamics determined by quasielastic light scattering. Quantitative agreement in the mean relaxation time and its shape parameters β (“stretched exponential”) is found with both methods. It is concluded that the collective motions are the ratelimiting quantity and hence determine the molecular dynamics. In the case of poly(cis-1,4-isoprene) the molecular dynamics of the linear and the starbranched polymer are compared. Two relaxation processes, a segmental and a normal mode, are observed. Its dependence on temperature, molecular weight, and the chemical structure is discussed.

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Author information

Authors and Affiliations

  1. Max-Planck-Institut für Polymerforschung, Postfach 31 48, 6500, Mainz, FRG

    F. Kremer, D. Boese, G. Meier & E. W. Fischer

Authors
  1. F. Kremer
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  2. D. Boese
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  3. G. Meier
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  4. E. W. Fischer
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Editor information

M. Pietralla W. Pechhold

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© 1989 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG

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Kremer, F., Boese, D., Meier, G., Fischer, E.W. (1989). Broadband dielectric spectroscopy on the molecular dynamics in polymer model-systems: polyphenylmethylsiloxane and linear and star-branched poly(cis-1,4-isoprene). In: Pietralla, M., Pechhold, W. (eds) Relaxation in Polymers. Progress in Colloid & Polymer Science, vol 80. Steinkopff. https://doi.org/10.1007/BFb0115424

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  • DOI: https://doi.org/10.1007/BFb0115424

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  • Publisher Name: Steinkopff

  • Print ISBN: 978-3-7985-0832-3

  • Online ISBN: 978-3-7985-1689-2

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