INFLUENCE OF CARBON BLACK, MIXING, AND COMPOUNDING VARIABLES ON DISPERSION.

Abstract

Several rubber properties were examined as a response to the mixing and compounding variables. These include processing characteristics (viscosity, die swell) and physical properties (modulus, tensile, resilience, and fatigue life). Three commonly used elastomers have been employed in this study. These are SBR-1712, SBR-1500, and EPDM-1070. In addition, a range of carbon blacks has been selected to encompass most of the presently existing commercial grades in a series of statistically designed programs. Other variables include black and oil loading, mixing energy, Banbury speed and fill factor, and the point of loose oil addition during the mixing cycle.