In fact, with any further
increase in filler loading the molecular mobility
decreased due to the formation of physical bonding
between the filler particles and rubber chain that
stiffen the matrix. The decrease of Eb values for
blends loaded with increasing irradiation dose may
be explained as, at a higher irradiation dose there
is an additional bonding between the filler and rubber
due to the large number of free radicals formed
under irradiation on the carbon black and rubber