Abstract
The behavior of a low-density polyethylene melt in exponential shear strain histories is examined and compared to its behavior in constant rate planar elongation. A new set of shear stress and first normal stress difference data in exponential shear are presented and used in several different material functions that have been previously proposed. Viscosities composed of principal stress differences for the two flows showed no correspondence suggesting that, contrary to previous assertions, exponential shear and constant rate planar elongation flows are fundamentally different. It is further suggested that the presence of vorticity makes exponential shear a weak, rather than strong, flow.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 5 March 1999/Accepted: 1 September 1999
Rights and permissions
About this article
Cite this article
Venerus, D. Exponential shear flow of branched polymer melts. Rheol. Acta 39, 71–79 (2000). https://doi.org/10.1007/s003970050008
Issue Date:
DOI: https://doi.org/10.1007/s003970050008