3.6.4. Effect of fuel
The impact of the two different curing systems, peroxide/coagent
and radiation/coagent (150 kGy) on the change in weight%
of NBR samples soaked in commercial gasoline is illustrated in
Fig. 9. Evidently, the final weight of the samples cured by radiation/
coagent is slightly lesser than that of the other ones cured
by peroxide/coagent. The results are clearly in good agreement
with the results of cross-link density and Mc, i.e. the greater the
cross-link density, the higher the fuel resistance.