3.4. Thermal properties TGA
The thermal stability of the NBR/EPDM blend
loaded with different contents of HAF carbon black
up to 100 phr was investigated using TGA.
Fig. 8 shows the data obtained for the variation
of RWF% against heating temperature for radiation
vulcanized at 50 kGy NBR/EPDM (50/50) and
loaded with different content of HAF. It can be seen
that the thermograms obtained for unloaded NBR/
EPDM blend start to deteriorate at 210 C while the
blend loaded with 25 phr HAF start to decompose
at 240 C. From the same thermogrames it can be