Reinforcing effect of carbon black
The reinforcing effect of carbon black means that carbon black can improve the physical properties of rubber such as strength, hardness, modulus and wear resistance, so that rubber has better bearing capacity and service life. The reinforcing effect of carbon black mainly depends on the following factors:
The specific surface area of carbon black:
The specific surface area refers to the surface area of carbon black per unit mass or unit volume, which reflects the size and shape of carbon black particles. Generally speaking, the larger the specific surface area, the smaller the carbon black particles and the larger the contact area with the rubber molecules, thereby increasing the friction and cohesion between rubber and carbon black, and improving the reinforcing effect of rubber.
The structure of carbon black:
Structure refers to the degree to which carbon black particles aggregate to form agglomerates, which reflects the gaps and pores between carbon black particles. Generally speaking, the higher the structure, the more gaps and pores between carbon black particles, and the stronger the entanglement with rubber molecules, thereby increasing the friction and cohesion between rubber and carbon black, and improving the rubber. Enhancement.
Dispersibility of carbon black:
Dispersion refers to the degree of uniform distribution of carbon black in the rubber matrix, which reflects the compatibility and fluidity of carbon black with rubber during the mixing process. Generally speaking, the better the dispersion, the carbon black forms a finer, more uniform and more stable dispersed phase in the rubber, so that each carbon black particle can fully exert its reinforcing effect and improve the overall performance of the rubber. .