LCR7000 & RHEOSIGHTS P/N: 974194 |
Rev: A
|
ECO: 52468
www.dynisco.com
From lab to production,
providing a window into the process
-55-
Example:
( )
( )
2
2
139800
1398
.
0
)
20
(
)
545
.
9
(
)
0
.
1
(
800
2
m
N
mm
N
=
=
=
π
τ
= 139800 Pa
Apparent Shear Viscosity
Formula for Shear Viscosity
)
Distance
(
8
Time)
(
8
4
4
4
4
c
b
p
c
c
p
b
p
c
L
D
F
D
L
S
D
F
D
π
π
γ
τ
η
=
=
=
•
Typical Units Pascal seconds (Pa-sec) or Poise (10poise=1 Pa-sec).
Where:
S
p
= speed of the plunger
D
b
= diameter of the barrel
D
c
= diameter of the capillary (die)
Example:
sec
-
Pa
575
=
)
20
)(
20
(
)
545
.
9
(
8
)
60
)(
800
(
)
0
.
1
(
4
4
π
η
=
Volumetric Flow Rate Calculation:
Formula for Volumetric Flow Rate
Time
Distance
4
2
2
b
p
b
D
S
R
Q
π
π
=
=
Where:
R
b
= radius of the barrel
R
c
= radius of the capillary (die)
S
p
= the speed of the plunger
D
b
=diameter of the barrel
D
c
= diameter of the capillary (die). (Assumes no leakage.)
Example: If the plunger moves a distance of 10 mm in 4.5 seconds
therefore:
/min
cm
9.541
or
/sec
159
)
5
.
4
(
4
)
10
(
)
545
.
9
(
3
3
2
mm
Q
=
=
π
