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Rheology pp 165-165 | Cite as

In-Line Elasticity Measurement for Molten Polymers

  • A. S. Lodge
  • L. de Vargas

Abstract

A new Melt Stressmeter has been constructed. This is a slitdie apparatus, having two flush-mounted and one slot-mounted pressure transducer, which yields values for hole pressure P, extrapolated exit pressure Pxt, wall shear stress σ, and wall shear rate s. For comparison, values of the first normal stress differente N1 and shear stress σ were measured using two Weissenberg Rheogoniometers. For two low-density polyethylenes at 150°C, the hole pressure measures elasticity; the exit pressure does not.

Keywords

Shear Stress Shear Rate Normal Stress Pressure Measure Wall Shear Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • A. S. Lodge
    • 1
  • L. de Vargas
    • 1
  1. 1.University of WisconsinUSA

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