Effect of Rubber Operating Oil Dosage on Properties of SSBR Compound
The effect of rubber operating oil(referred to as operating oil)dosage on the properties of the compound in the formulation system of solution polymerized styrene butadiene rubber(SSBR)and silica was studied.The results showed that as the dosage of operating oil increased,the Mooney viscosity,FL and Fmaxof the compound decreased,t5 and t90 prolonged.The Shore A hardness,modulus stress and tensile strength of the vulcanizate decreased,the elongation at break,tear strength and rebound value increased,the wear resistance and cutting resistance decreased,the elastic modulus and viscous modulus decreased,the loss factor at 0 and 70 ℃ changed little,and the glass transition temperature(Tg)decreased.The Mooney viscosity,scorch time and torque of the SSBR compound and the Shore A hardness,elongation stress,elongation at break,rebound value and Tg of the vulcanizate were highly linearly related to the dosage of operating oil.
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