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Time-dependent viscoelastic functions for cis-1,4-polybutadiene melts

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Summary

Transient linear and nonlinear viscoelastic functions were measured on cis-1,4-polybutadiene melts and compared to the ROUSE theory and a nonlinear modification of the network theory. The latter was found to overestimate material nonlinearity, especially of the first normal stress coefficient at cessation of steady shear flow. Steady-state functions were recovered from the time dependent measurements. Single step strain experiments in the linear region were recorded by computer, up to 7 milliseconds after the sudden shear jump; a paradox arised in the interpretation of shear versus normal stress after a sudden shear strain.

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Authors and Affiliations

  1. Institut für Makromolekulare Chemie der Universität Freiburg, — Hermann-Staudinger-Haus, Stefan-Meier-Straße 31, D-7800, Freiburg i.Br., Germany

    G. A. Alvarez & H. -J. Cantow

Authors
  1. G. A. Alvarez
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  2. H. -J. Cantow
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Additional information

Financial support from DEUTSCHE FORSCHUNGSGEMEINSCHAFT and FONDS DER CHEMISCHEN INDUSTRIE is gratefully acknowledged. We thank CHEMISCHE WERKE HÜLS AG for providing the cis-1,4-polybutadienes. Finally, we are especially indebted to Dr. Michael KOWALSKI for intensive cooperation with ELECTRONICS.

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Alvarez, G.A., Cantow, H.J. Time-dependent viscoelastic functions for cis-1,4-polybutadiene melts. Polymer Bulletin 8, 155–162 (1982). https://doi.org/10.1007/BF00263022

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  • DOI: https://doi.org/10.1007/BF00263022

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