TA Instruments RSA-G2, Manual

Page: 22 / 127

Time Sweep
In this test. the temperature, strain, and frequency are all held constant while the viscoelastic properties are measured as a function of time. Time sweep
provides important information on time-dependent structural changes such as a curing reaction or fatigue studies. The right figure shows an example
of a two-part epoxy cured on a supporting fiberglass braid using a dual cantilever clamp. At short times the storage modulus is low and increases in
magnitude as the epoxy cures and hardens.
Time
" 1011
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'--'
en
::J
:;
"0
o
E
1010
en
en
..9
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'--'
en
::J
:; 109
"0
o
E
(])
0)
Q
Time Sweep on Two-Part Epoxy
Temperature:
25
0 C
Strain:
0,025%
Frequency: 1 Hz
Dual Cantilever
(/)£
108
Testing Modes and Applications
21
o
2000 4000
time (s)
6000 8000