Ph.D. thesis (pdf) - dirac

132 Mean squared displacement
/ a 2
0.02
0.015
0.01
0.005
0.01 MPa
500 MPa
0
0 0.2 0.4 0.6 0.8 1 1.2
T / T g
Figure 7.11: The temperature dependence of the mean square displacement of
cumene at ambient pressure and at 500 MPa. The temperature is scaled by the pressure
dependent T g and the y-axis is scaled with a 2 ∝ ρ −2/3 evaluated at (T g (P), P).
0.02
0.018
0.016
P=0.1 MPa
300 MPa
0.014
a 2
0.012
0.01
0.008
0.006
0.004
0.002
0
0 0.5 1 1.5
T / T g
Figure 7.12: The temperature dependence of the mean square displacement of glycerol
at ambient pressure and at 300 MPa. The temperature is scaled by the pressure
dependent T g and the y-axis is scaled with a 2 ∝ ρ −2/3 evaluated at (T g (P), P).