Keywords : Vulcanization properties
journal of kerbala university,
2014, Volume 10, Issue 0, Pages 258-262
Different amounts of sulfur (0.5-2.5 pphr) were added to hybrid rubber batch (50% / 50%), natural rubber - rubber Acrylonitrile - butadiene and measure the impact of these additions on the vulcanization properties of hybrids batch. Rheometer device was used to measure the cure and vulcanization time, the viscosity of the rubber compound, and the max torque. Results shown that the max torque directly proportional to the ratio of sulfur added as increasingly determined from (11.95 Nm) at the rate of addition (0.5 pphr) to sulfur (24.385 Nm) with sulfur content (2.5 pphr), the time of maturation, it is inversely proportional with these additions where the fall of the value of (1.21 m.min) at the rate of addition (0.5 pphr) to sulfur (0.74 m.min) with a ratio sulfur (2.5 pphr), while the vulcanization time fluctuates from low value (4.13 m.min) at the rate of addition (0.5 pphr) to sulfur (2.87 m.min) with sulfur content (1.5 pphr), and after this ratio begins to rise up up to (3.24 m.min) at the rate of addition (2.5 pphr). Also the results showed that the viscosity of the composite rubber begins to decline of the value of (10.854 moony) to (7.884 moony) when the proportion of added sulfur (0.5 pphr) and (2 pphr), respectively, and when the proportion of added sulfur (2.5 pphr) ,this percentage rises to (9.963 moony).