Rheologica Acta

, Volume 50, Issue 11–12, pp 917–924 | Cite as

Viscoelastic properties of a silicone resin during crosslinking

  • Friedrich Wolff
  • Christoph Kugler
  • Helmut MünstedtEmail author
Original Contribution


Viscoelastic properties of a silicone resin crosslinked at various extents were characterised by means of rheology. The influence of temperature on the viscoelastic properties of the material as-delivered and in a state pre-crosslinked approximately to the gel point has been investigated by dynamic-mechanical measurements. While the glass transition temperature is increased by the crosslinking, no changes of the free volume fraction at T g and its thermal expansion coefficient were observed. Taking the different glass transition temperatures into account, it could be shown that the corresponding WLF-parameters are the same. The molar mass and, hence, the viscosity of the material can be increased by a heat treatment. The dependence of the zero shear-rate viscosity on the weight average molar mass indicates that the existence of entanglements of the polymer molecules is not very probable.


Silicone resin Crosslinking Viscoelasticity Temperature dependence WLF-parameters 



The authors gratefully acknowledge the funding of the German Research Foundation (DFG), which, within the framework of its “Excellence Initiative”, supports the Cluster of Excellence “Engineering of Advanced Materials” ( at the University of Erlangen-Nuremberg. The silicone resin was kindly supplied by Wacker Chemie AG, Germany.


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Friedrich Wolff
    • 1
  • Christoph Kugler
    • 1
  • Helmut Münstedt
    • 1
    Email author
  1. 1.Institute of Polymer Materials, Department of Materials ScienceFriedrich-Alexander-University Erlangen-NürnbergErlangenGermany

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