The dependence of the retardation spectrum width on the network chain length and on its distribution

  • A. Havránek
Permanent Networks
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 75)


The relative portions and length distributions of the elastically active network chains and dangling chains of the idealised networks composed from difunctional and trifunctional units — the ratio of the units has been varied — have been calculated by the theory of branching processes. The results have been compared with the viscoelastic parameters obtianed by the measurement of model polyurethane networks. The main results of the comparison are given.

Key words

Polymer viscoelasticity model network branching process dangling chain 


  1. 1.
    Dušek K, Prins W (1969) Adv Polym Sci 6:1CrossRefGoogle Scholar
  2. 2.
    Havránek A, Nedbal J, Berčik Č, Ilavský M, Dušek K (1980) Polym Bull 3:497CrossRefGoogle Scholar
  3. 3.
    Havránek A, Dušek K, Ilavský M, Krakovský (1987) contributed to Coll & Polym Sci.Google Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1987

Authors and Affiliations

  • A. Havránek
    • 1
  1. 1.Department of Polymer PhysicsCharles UniversityPragueCzechoslovakia

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