✦ LIBER ✦

Analysis of flow data on molten polymers

✍ Scribed by M.M. Cross

Publisher: Elsevier Science
Year: 1966
Tongue: English
Weight: 335 KB
Volume: 2
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(66)90050-4

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✦ Synopsis

On the basic assumption that viscosity is a continuous function of shear rate it is deduced that any non-Newtonian fluid should conform to a flow equation of the form

where ~ is the viscosity at shear rate D, 7/0 and ~7o~ are limiting values at respectively zero and infinite rate of shear, and = is a constant.

With a value of ,~ for the index n the equation is applied successfully to published data on both polystyrene and polyethylene melts.

An analysis by Bingham (I) in which the non-Newtonian flow of polymer melts is attributed solely to elasticity is shown to be inadequate.

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