The hardness values of the NR vulcanisates are shown in Figure 2. Compared to control, the
filled vulcanisates exhibited higher hardness values, with DRB giving the highest value, followed
by CaCO3. The hardness values are seen to correspond to the torque difference values (Table 5),
which indicates that the improvement in hardness of the filled vulcanisates was caused by an
increase in the cross-link density of the vulcanisates. On the other hand, it can be seen (Figure 3)
that the resilience of the vulcanisates, i.e. the elasticity of the rubber chain, slightly decreased with
the addition of a filler.
The hardness values of the NR vulcanisates are shown in Figure 2. Compared to control, thefilled vulcanisates exhibited higher hardness values, with DRB giving the highest value, followedby CaCO3. The hardness values are seen to correspond to the torque difference values (Table 5),which indicates that the improvement in hardness of the filled vulcanisates was caused by anincrease in the cross-link density of the vulcanisates. On the other hand, it can be seen (Figure 3)that the resilience of the vulcanisates, i.e. the elasticity of the rubber chain, slightly decreased withthe addition of a filler.
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