chemia - Studia

ANDRA TĂMAŞ, MARTIN VINCZE
2%B + 98% sol.1
35
30
a
P
,
s
t
re
s
25
r
a
e
h
S
20
15
0 20 40 60 80 100 120 140 160
Shear rate, s -1
after 1 hour after 10 days after 30 days
Figure 5. Dependence τ = f (γ ) for sample PC 2 (t=32°C)
3. The influence of the amphiphilic surfactant VB
For samples PA 3-9 , PA 3-10 and PA 3-12 , in Figure 6, is shown the τ = f (γ&
)
dependence, and the evolution of apparent viscosity with amphiphilic
surfactant content is shown in Figure 7. From the obtained rheological
equations (Table 6) is observed the non-Newtonian behavior specific to
yield-pseudoplastic fluids, and the increase of apparent viscosity with
increasing the concentration of amphiphilic component, respectively.
&
3%VAD; t=25 o C
40
35
30
Shear stress, Pa
25
20
15
10
5
0
0 200 400 600 800 1000 1200 1400
Shear rate, s -1
9%VB 10%VB 12%VB
Figure 6. Dependence τ = f (γ&
) for PA 3-9 , PA 3-10 and PA 3-12
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