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 notmuch different. Likewise, tensile strength of gum
andfilledNRvulcanizates containing50 phr ofCBis shownto
be similar [13]. The strain induced crystallization is knownto
be responsible for the high strength of gumNR vulcanizates.