Rheologica Acta

, Volume 54, Issue 3, pp 169–183 | Cite as

Analytic slip-link expressions for universal dynamic modulus predictions of linear monodisperse polymer melts

  • Maria Katzarova
  • Ling Yang
  • Marat Andreev
  • Andrés Córdoba
  • Jay D. Schieber
Original Contribution


The discrete slip-link model (DSM) is a robust mesoscopic theory that has great success predicting the rheology of flexible entangled polymer liquids and gels. In the most coarse-grained version of the DSM, we exploit heavily the universality observed in the shape of the relaxation modulus of linear monodisperse melts. For this type of polymer, we present here analytic expressions for the relaxation modulus. The high-frequency dynamics which are typically coarse-grained out from the DSM are added back into these expressions by using a Rouse chain with fixed ends to represent the fast motion of Kuhn steps between entanglements. We find consistency in the friction used for both fast and slow modes. We test these expressions against experimental data for three chemistries and molecular weights with good agreement. Using these analytic expressions, the polymer density, the molecular weight of a Kuhn step, M K, and the low-frequency cross-over between the storage and loss moduli, \(G^{\prime }\) and \(G^{\prime \prime }\), it is now straightforward to estimate model parameter values and obtain predictions over the experimentally accessible frequency range without performing expensive numerical calculations.


Polymer melt Dynamic moduli Rouse theory Relaxation modulus Modelling Rheology 



Support of this work by Army Research Office Grants W911NF-08-2-0058 and W911NF-09-2-0071 are gratefully acknowledged. We would like to thank Dr. S. Coppola for the PB204 data in Fig. 9 and Dr. D. Auhl for the PI data in Fig. 10.

Supplementary material

397_2015_836_MOESM1_ESM.nb (266 kb)
(NB 265 KB)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Maria Katzarova
    • 1
  • Ling Yang
    • 1
  • Marat Andreev
    • 2
    • 3
  • Andrés Córdoba
    • 1
  • Jay D. Schieber
    • 1
    • 2
  1. 1.Department of Chemical and Biological Engineering and Center for Molecular Study of Condensed Soft MatterIllinois Institute of TechnologyChicagoUSA
  2. 2.Department of Physics IllinoisInstitute of TechnologyChicagoUSA
  3. 3.Center for Molecular Study of Condensed Soft MatterIllinois Institute of TechnologyChicagoUSA

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