viscosity curve

viscosity curve

[vi′skäs·əd·ē ‚kərv]
(fluid mechanics)
A graph showing the viscosity of a liquid or gaseous material as a function of temperature.
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Technical value analyzed through the viscosity curve as a function of temperature (lowest slope) 100 points 50% -
In what follows we will observe how this shape of the viscosity curve will change when modifying the PVC particle size distribution, the PVC particle content, or when substituting PVC particles by calcium carbonate particles.
He elaborates, "In injection molding, you can vary injection speed and monitor pressure to generate an in-mold viscosity curve.
Another standard is ASTM D5133, based on the Scanning Brookfield Technique (SBT) that can provide a viscosity curve from -5 to -40[degrees]C, and calculates the Gelation Index of the sample.
With this data and with some correction factors (Weissenberg/Rabinowitsch, Schummer, Dodge/ Metzner or Reiner/Philipoff) a viscosity curve across a range of shear stresses can be measured and translated into real results.
This, says Milacron, allows operators to compare new or regrind material with a previously tested batch and determine parameter changes needed to obtain the same viscosity curve and flow characteristics.
So the actual minimum start-up temperature is where the viscosity curve crosses the 300 cPs line.
The melt flow test is carried out according to ISO 1133 and ASTM D1238, and measures one point on the viscosity curve under standard conditions.