On the Effect of Pressure on the Shear and Elongational Viscosities of Polymer Melts
Journal article, 2004

The effect of pressure and temperature on the shear and elongational deformation rate-dependent viscosities has been experimentally investigated for several polymers (HDPE, LDPE, LLDPE, PP, PC, PMMA, and PS) on a capillary rheometer with a back-pressure device. Pressure, β, and temperature, α, coefficients have been determined through simultaneous fitting of the shear and extensional viscosity data by the modified White-Metzner model. The dependence of β and α on temperature and pressure, respectively, was investigated and it has been found that simple relationships exist between pressure and temperature sensitivity coefficients for individual polymers. © 2004 Society of Plastics Engineers.






Tomas Sedlacek

Tomas Bata University in Zlín

Martin Zatloukal

Tomas Bata University in Zlín

Petr Filip

Czech Academy of Sciences

Antal Boldizar

Chalmers, Department of Materials Science and Engineering

Petr Saha

Tomas Bata University in Zlín

Polymer Engineering and Science

0032-3888 (ISSN) 1548-2634 (eISSN)

Vol. 44 7 1328-1337

Subject Categories

Materials Engineering



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