Neutron Spin Echo Results in Polymer Blends

Neutron Spin Echo Results in Polymer Blends 

Q-dependent Rouse rates were obtained by fitting each spectrum separately. For a comparison with the BS data (see below) the obtained values for Wf (Q) were transformed into average relaxation times for the Rouse self-correlation function by (r (Q))=18TiQ V[ Wf (Q)] (Eq. 3.18). 

In order to relate to the BS-results at 330 K, temperature shift factors Uj-covering the appropriate T-range were also measured using the very high res- 

The data were fitted to a stretched exponential function (Eq. 4.9) setting the stretching parameter to its dielectric value. The solid lines included in Fig. 6.3 display the resulting curves. These fits lead to the Q-dependent characteristic relaxation times TKww(Q) hich are converted to average relaxation times by Eq. 5.25 (see Fig. 6.4). 

Although these results need to be understood - and confirmed in other similar systems - the authors claim that they are in qualitative agreement with a model of droplet formation and chain localization resulting from the existence of microscopic heterogeneities within the spinodal boundaries of the phase diagram [256]. 

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