On the Effect of Pressure on the Shear and Elongational Viscosities of Polymer Melts
Artikel i vetenskaplig tidskrift, 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.

pressure

shear

viscosity

polymers

Författare

Tomas Sedlacek

Univerzita Tomase Bati ve Zline

Martin Zatloukal

Univerzita Tomase Bati ve Zline

Petr Filip

Czech Academy of Sciences

Antal Boldizar

Chalmers, Institutionen för materialteknik

Petr Saha

Univerzita Tomase Bati ve Zline

Polymer Engineering and Science

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

Vol. 44 1328-1337

Ämneskategorier

Materialteknik

DOI

10.1002/pen.20128