Tensile strength of all vulcanizates is shown in Fig. 3. As
can be seen, clay-filled vulcanizate exhibits the highest
tensile strength while tensile strength of the other vulcanizates is not much different. Likewise, tensile strength of gum
and filled NR vulcanizates containing 50 phr of CBis shown to
be similar [13]. The strain induced crystallization is known to
be responsible for the high strength of gum NR vulcanizates.