Due to the large specific surface area of white carbon black, it tends to secondary aggregation, and it is very easy to absorb water in the air, resulting in strong hydrogen bond association between hydroxyl groups, which further improves the cohesion between particles. It is much more difficult to mix and disperse than carbon black, and when it is mixed in a large amount, it is easy to form gels, harden the rubber, and generate heat during mixing. In order to obtain good dispersion, it is required to maintain the highest shear force during the initial mixing so that these aggregate particles of silica are destroyed as much as possible without causing excessive mechanical degradation of the rubber molecular chain . For this reason, white carbon black should be added in small portions in order to reduce heat generation. Properly increasing the mixing temperature is conducive to removing part of the white carbon black surface from adsorbing moisture, reducing the cohesion between particles, and helping the white carbon black to disperse in the rubber compound.