Relationship between particle size of carbon black and rubber properties

Since the activity of carbon black, the point exists on the surface of carbon black, so the smaller the carbon black particles, the larger the surface area, the more active points of the same quality of carbon black, which can better play the role of carbon black on the chemical bonding and physical adsorption of rubber, thus improving the reinforcing effect. Therefore, the smaller the particle size of carbon black, the larger the specific surface area, the more active points of the same quality of carbon black, which can better play the role of chemical combination and physical adsorption of carbon black on rubber, thus improving the reinforcing effect. Therefore, the particle size of carbon black is the second factor affecting the reinforcing performance of carbon black, i.e. the breadth factor. So, the particle size of carbon black is the second factor that affects the reinforcing performance of carbon black, i.e. the breadth factor.
The smaller the particle size of carbon black, the higher the tensile strength of vulcanized rubber, tear strength, constant tensile stress, abrasion resistance, hardness, flex-cracking resistance, resilience and elongation at tear. The resilience and elongation at tear are reduced. However, if the particle size is too small, it will be easy to agglomerate due to the large cohesion between particles, which will lead to dispersion difficulties in mixing and make the plasticity decrease, and reduce the performance of extrusion.