Encyclopedic Dictionary of Polymers

2011 Edition
| Editors: Jan W. Gooch

Lecyar Model

  • Jan W. Gooch
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_6861
A model for viscosities for polymer blends which do not obey simple mixture laws. The Lecyar model can accommodate a viscosity minimum, maximum, or both in the composition range from 0% to 100% of one polymer intimately blended with another. For a given shear rate and temperature it has the form:
$${\rm ln}\ \eta _B= Am_1 \,^3 + Bm_2 \,^3 + Cm_1 \,^2 m_2 + Dm_1 m_2 \,^2 $$
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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jan W. Gooch
    • 1
  1. 1.AtlantaUSA