For a polyisobutylene/decalin solution “D2b,” agreement over a range of values of shear rate γ̇ up to (where the stress ratio ) is found between values of measured near 20°C using a Torsional Balance Rheometer (“TBR”) and a “Stressmeter” (“SM”, a slit‐die rheometer using transverse slots to measure hole pressures); viscosity values also agree. Time‐temperature superposition behavior exhibited by SM data taken in a temperature range 22–99°C suggest that the range of validity of the SM method for determining approximately extends up to here, and, in the SM die, the Reynolds number This γ̇ value is four times higher than the greatest γ̇ value used in previous similar tests of the SM method made with a similar but more concentrated solution “D2”.
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August 1989
Research Article|
August 01 1989
An Attempt to Measure the First Normal‐Stress Difference in Shear Flow for a Polyisobutylene/Decalin Solution “D2b” at Shear Rates up to
A. S. Lodge
A. S. Lodge
Engine and Rheology Research Centers, Department of Engineering Mechanics, and Engineering Experiment Station, University of Wisconsin‐Madison, Madison, Wisconsin 53706
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J. Rheol. 33, 821–841 (1989)
Citation
A. S. Lodge; An Attempt to Measure the First Normal‐Stress Difference in Shear Flow for a Polyisobutylene/Decalin Solution “D2b” at Shear Rates up to . J. Rheol. 1 August 1989; 33 (6): 821–841. https://doi.org/10.1122/1.550066
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