5 shows the distributions obtained after the numerical inversion procedure
of InDQ
for pure samples based on NR and SBR,
respectively.
This regularization analysis is able to discriminate between located network heterogeneities with phase separated morphology and randomly (homogeneously) distributed network heterogeneities as it has been demonstrated [31]. The studied rubber blends show a phase separated morphology (see TEM images in Fig. 1) and consequently, a bimodal spatial distribution of dipolar couplings, corresponding to the network structure for the two rubber phases, would be expected in the NMR experiments. Unfortunately the dipolar coupling distribution for the