For the tensile tests, five dumbbell shaped specimens
were cut from the moulded sheets with a thickness of
about 2 mm and tensile tests were conducted according to
ISO 37 using a universal tensile testing machine (model
Instron 3366) at a crosshead speed of 500 mm/min. The
tensile strength, elongation at break and tensile modulus
(M100 and M300) data were evaluated from stress-strain
determinations and average values from five repeated
tests for each vulcanizate were recorded.