Rheotens mastercurves and elongational viscosity of polymer melts
(1996) Rheologica Acta : an international journal of rheology — Vol. 35, n° 2, p. 117-126 (1996)
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- Abstract
- In a Rheotens experiment, the tensile force needed for elongation of an extruded filament is measured as a function of the draw ratio. For thermo-rheologically simple polymer melts, the existence of Rheotens-mastercurves was proved by Wagner, Schulze, and Gottfert (1995). Rheotens-mastercurves are invariant with respect to changes in melt temperature and changes in the average molar mass. By use of purely viscous models, we convert Rheotens-mastercurves of a branched and a linear polyethylene melt to elongational viscosity as a function of strain rate. The resulting elongational viscosity from constant force extension experiments is found to be in general agreement with what is expected as steady-state viscosity of polyethylene melts measured in either constant strain-rate or constant stress mode.
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Wagner, M., Collignon, B., & Verbeke, J. (1996). Rheotens mastercurves and elongational viscosity of polymer melts. Rheologica Acta : an international journal of rheology, 35(2), 117-126. https://doi.org/10.1007/BF00396038 (Original work published 1996)