cross-linking is taking place. But with higher amount of
peroxide the probability of chain scission increases.
Fig. 9 illustrates the dependence of gel content on peroxide
content of the cross-linked samples. It can be seen
and samples with 0.2 and 0.3 wt.% of peroxide. While the
pure EOC survived the DMA test only till 80 C the sample
with 0.3 wt.% of peroxide ran till 160 C. Even though the
network was not fully created there is a big change in
the storage modulus curve. The 0.4–0.6 wt.% of peroxide
curves have very similar trend and they are close to each
other; just there is a small increase with increase in peroxide
level. 0.7 curve has highest value of storage modulus
till 180 C, then it is rapidly decreasing and has lower value
than the 0.6 curve. In the 180–200 C temperature range
the degradation of 0.7 samples is decreasing the mechanical
properties. The effect of peroxide content on storage
modulus at various temperatures is very nicely visible on
Fig. 11. The general trend is increase of storage modulus
with increase in peroxide content with exception of sample
0.7 and temperatures above 180 C.
In Figs. 12 and 13, dependences of tand on peroxide
content and temperature are shown. Increase in temperature
causes an increase in tand value for all samples in
the