volatile matter, consists of the amount of oil added as a processing
agent and a small amount 1–2% of decomposed fragments of the
vulcanizing agent (sulfur or peroxide) vulcanization accelerator
and antioxidant [25]. The second fraction 350–550 C represented
the medium volatile matter, the amount of decomposed
polymer. Evidently, the radiation curing system exhibits higher
thermal stability than the others as confirmed by the data shown
in Table 7.
The differential thermal gravimetric (DTG) curves demonstrate
for the three curative systems, only one peak indicating a single
stage decomposition in the NBR composite, Fig. 3, with a consistent