Influence of Compounding Process on the Properties of Styrene-Butadiene Rubber/Butadiene Rubber/Carbon-Black Blends

Styrene-butadiene rubber/butadiene rubber/carbon-black blends were prepared with HAAKE rheometer in two steps.There were two processes used.One was that styrene-butadiene rubber(SBR) and carbon black(CB) were blended in the first step and then butadiene rubber(BR) were incorporated in the second step,the other was BR and CB blended in the first step and then SBR incorporated in the second step.Bound rubber content,physical mechanical properties and dynamic mechanical property were tested.From the results,it can be found that CB and rich phase rubber were blended firstly can make more bound rubber and improve mechanical properties.And the result of dynamic mechanical analysis shows that the kind of rubber compound in first step is remarkably influence the viscoelastic property.Moreover,the compatibility will be better when CB and BR are blended in the first step.