Chemistry Reference
In-Depth Information
At Fixed
.
Thixotropic
Time independent
Rheopectic
Time
FIGURE 4.29
Viscosity
time relations for time-dependent fluids.
Shear rates in
processing
Power law
Newtonian
Shear
thinning
Cone and plate
10 S
−
1
10
3
S
−
1
.
Log
Capillary rheometers
FIGURE 4.30
Typical rheometer shear rate ranges and polymer melt flow curve. The lower shear rate
region of the flow curve exhibits viscosities that appear to be independent of
γ
. This is the
lower Newtonian region.
