that as the peroxide content increases, gel content also increases
with an exception in the case of 0.2 and 0.3 wt.% of
peroxide. In the case of 0.2 and 0.3, there was no insoluble
fraction left out after extracting with xylene, which implies
that the cross-linking reaction lead only to longer molecules
but the network was not created. There is a sharp increase
(0–54%) in gel content from 0.3 to 0.4 wt.% of
peroxide. Then, in the case of 0.5, 0.6 and 0.7, gel content
gradually increases with increasing peroxide content. Increase
in gel content is due to increase in cross-link network
and thus cross-link density.
The results of DMA analysis are illustrated in Figs. 10–
13. Fig. 10 shows storage modulus as a function of temperature.
While for samples with 0.2 and 0.3 wt.% of peroxide
the gel content was zero (no difference from pure EOC), the
DMA analysis revealed big difference between pure EOC