Elongational viscosity of LDPEs and polystyrenes using entrance loss data
Document Type
Article
Publication Date
2-1-2008
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
For two low-density polyethylenes and two polystyrenes, axisymmetric and planar elongational viscosities are estimated using entrance loss data from capillary and slit rheometers, respectively. The elongational viscosity is estimated by optimizing the values of various parameters in the Sarkar-Gupta elongational viscosity model such that the entrance loss predicted by a finite element simulation agrees with the corresponding experimental data. The predicted entrance loss is in good agreement with the experimental data at high flow rates. The difference in the experimental and predicted entrance loss at lower flow rates might have been caused by large error in the experimental data in this range.
Publication Title
Polymer Engineering and Science
Recommended Citation
Walczak, K.,
Gupta, M.,
Koppi, K.,
Dooley, J.,
&
Spalding, M.
(2008).
Elongational viscosity of LDPEs and polystyrenes using entrance loss data.
Polymer Engineering and Science,
48(2), 223-232.
http://doi.org/10.1002/pen.20818
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3836
Publisher's Statement
© 2007 Society of Plastics Engineers. Publisher’s version of record: https://doi.org/10.1002/pen.20818