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BY 4.0 license Open Access Published by De Gruyter November 16, 2018

Flow Behavior of a Polypropylene Melt in Capillary Dies

  • E. Mitsoulis , H.-J. Luger , J. Miethlinger and W. Friesenbichler


Using capillary dies having different diameters, D, and length-to-diameter L/D ratios, a full rheological characterization has been carried out for a polypropylene melt, and the experimental data have been fitted both with a viscous model (Cross) and a viscoelastic one (the Kaye – Bernstein, Kearsley, Zapas/Papanastasiou, Scriven, Macosko or K-BKZ/PSM model). Particular emphasis has been given on the pressure-dependence of viscosity. It was found that only the viscoelastic simulations were capable of reproducing the experimental data well, while any viscous modeling always underestimates the pressures, especially at the higher apparent shear rates and L/D ratios.

*Correspondence address, Mail address: Evan Mitsoulis, School of Mining Engineering and Metallurgy, National Technical University of Athens, Zografou 157 80, Athens, Greece, E-mail:


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Received: 2017-09-11
Accepted: 2017-12-28
Published Online: 2018-11-16
Published in Print: 2018-11-19

© 2018, Carl Hanser Verlag, Munich

This work is licensed under the Creative Commons Attribution 4.0 International License.

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