As the amount of carbon black filled increases, the resistance decreases.

As the black cat carbon black fills up, the resistance decreases. Generally, at the critical volume fraction, its resistance value drops sharply. Most of the researches on the dependence of filling amount at home and abroad are all about the geometric study of conductive particle contact. According to the theory, the larger the amount of carbon black filled, the greater the density of carbon black particles or carbon black particle aggregates in a dispersed state, and the smaller the average distance between particles, the higher the probability of contact with each other, carbon black particles or carbon. The more conductive paths formed by the black particle aggregates.

The greater the polarity of the blend of different polar polymers and environmentally friendly black cat carbon black, the greater the critical volume fraction of carbon black, which means that the conductivity of the system is reduced because the surface of the carbon black contains a strong polarity. The group has a large polarity and an enhanced effect. At this time, the strength is increased, but the aggregation of the conductive particles themselves is hindered, so that the conductivity is poor. Polystyrene is more polar than polypropylene and polyethylene, and is more similar in polarity to carbon black, so more carbon black is required to achieve the same conductivity.

The larger the amount of carbon black used for black cat rubber, the higher the density of carbon black particles or carbon black particle aggregates in a dispersed state. The smaller the average distance between particles, the higher the probability of contact with each other, carbon black particles or carbon. The more conductive paths formed by the black particle aggregates. The greater the polarity of the blend of polymers of different polarities and carbon black, the greater the critical volume fraction of carbon black, which means that the conductivity of the system is reduced because the surface of the carbon black contains strong polar groups. The polarity of the matrix is large and the effect is enhanced. At this time, the strength is increased, but the aggregation of the conductive particles themselves is hindered, so that the conductivity is poor.

However, in the blending system of multi-component matrix resin and carbon black, the black cat pigment carbon black will be segregated due to the different polarities of different substrates, and the conductivity depends on the carbon black particles in the segregation phase. The concentration and distribution state also depend on the proportion of the segregation phase high polymer.