Ph.D. thesis (pdf) - dirac

6.3. Nonergodicity factor 107
1
0.95
0.9
140 K Patm
140K 300MPa
200K Patm
223K 300MPa
294K 300MPa
0.85
0.8
f(Q)
0.75
0.7
0.65
0.6
0.55
0.5
2 4 6 8
Q [nm −1 ]
Figure 6.15: The nonergodicity factor, f Q , as a function of Q. PIB3580 at different
temperatures and pressures. It is seen that the Q dependence is leveling off at low
Q. Lines are guides to the eye.
1
1
0.9
0.9
0.8
0.8
f(Q)
0.7
f(Q)
0.7
0.6
0.6
0.5 Patm Q=2nm −1
300MPa Q=2nm −1
0.4
0 50 100 150 200
T [K]
0.5 Patm Q=4nm −1
300MPa Q=4nm −1
0.4
0 50 100 150 200
T [K]
Figure 6.16: Nonergodicity factor of cumene as a function of temperature at atmospheric
pressure and 300 MPa. The left figure shows the result at Q=2 nm −1 and
the right figure shows data from Q=4 nm −1