TA Instruments RSA-G2, Руководство пользователя

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The RSA-G2 lmmersion System was designed
for mechanical testing of solid materials
while immersed in a liquid. The temperature
of the fluid environment is measured by
a platinum resistance thermometer, PRT.
immersed in the liquid, which bypasses
the standard control loop of the forced
convection oven. Obtainable temperature
range is -10 to 200°C. The system includes
tension, compression, and three-point
bending geometries. The cup surrounding
the sample is removable for easy sample
loading.
RSA-G2 Immersion Application
The left figure shows the storage modulus, loss
modulus, and tan
(\
for temperature ramp tests run on
an automotive coating tested in air and immersed in
a solvent. The solvent has a dramatic effect on the
mechanical properties of the coating. The water has
a plasticizing effect on the material.The glass transition
temperature is observed to decrease by almost 29°C
from 102°C to 73°C.
The figure on the right shows a series of frequency
sweeps run on an Elastomer sample immersed in
synthetic oil at a temperature of 25 °C for three days.
The frequency sweep was run on the sample as soon
as immersed on day one, and repeated on days two
and three. The storage modulus E' showed a 16%
decrease in magnitude over the three days.
Tension
Up to 25 mm long,
1 2.5 mm wide and
1 .5 mm thick.
Compression
15 mm plate diameter;
maximum sample thickness is 10 mm.
Three- Point Bend
Includes interchangeable span pieces
to accommodate sample lengths of
10, 15, and 20 mm. Maximum sample
width is 12.5 mm and maximum
thickness is 5
mm.
Effect of Solvent on Automotive Coating Elastomer Immersed in Synthetic Oil
�
10'
3
'5
10"
'0
0
:;:;
"'
"'
10'
.9
g
"'
10'
:::J
'5
'0
Strain: 0.2%
0
:;:;
lOS
(])
OJ
2
.2
U)
lOS
-----
0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0
Temperature
C
C
)
Clamping Systems
13
1.2
1.0
0.8
0.6
0'
:::J
".,
0.4
0.2
0.0
-
Dayl
--Day2
••••
Day
3
E'
=
1.5xlOS
-.. :::-:.:::-:.:: :�:::.::::.:: ::::: ...
-----
�
-:
..
-- :: ............. .
Temperature: 25'C
Strain: 0.5%
Compression
10-1 10"
Frequency
(Hz)
10'