Neutron Scattering

We now use these data, in order to investigate the scaling prediction inherent in Eq.[15 .19 ] .
Fig .15 .12 presents a plot of the data of Fig .15 .11, now as a function of the Rouse scaling
variable (Eq.[15 .20]) .
10 1 20
2 (W' 4 t) 2
0
Figure 15 .12 :
Single chain structure factor from PEE melts as a function ofthe Rouse scaling
variable .
The data follow with satisfying precision the scaling prediction. The Small deviations are
related to the translational diffusion of the chairs . This becomes evident from Fig .15 .13,
where the obtained relaxation rates I-(Q) are plotted versus Q in a double logarithmic fashion .
Q/A-1
Figure 15 .13 : Relaxation rates from PEE melts vs . Q for two different temperatures.
15-18