Carbon Black is added to the rubber used in tire treads, to high-pressure hoses, and has other demanding applications, as well as added to plastics as material reinforcement.
This characteristic can be divided intocarbon black and material physical adsorption (depending on the carbon black's particle size and structure), and carbon black's particle surface and material chemical reaction (depending on the carbon black's surface properties).
Conductive carbon black is added to natural rubber or other materials to decrease their electrical resistance.
For example: the conductivity of natural rubber is 1015Ωcm, whereas the conductivity of conductive rubber (natural rubber + conductive carbon black) is between 1-1015Ωcm.
It is believed that this characteristic is the result of the structure of carbon black particles contacting each other which forms conductive channels or because of the "tunnel effect" of electrons jumping between dispersed carbon black particles.
Carbon black has strong tint properties, it is heat stable and suitable for plastic and film coloring.
This property is believed to result from the particle size and the structure's interaction with light. Pigment Carbon Black
4. Preventive properties against ultraviolet degradation
Carbon black's absorption of ultraviolet light is excellent. Adding carbon black to other materials prevents ultraviolet degradation.
This is due to stress-fissure prevention in plastics with carbon black, which refines their crystals.