Reducing dynamic heat build‐up of styrene butadiene rubber/carbon black by filling aramid pulp coated with natural rubber latex

The manufacture of green tires with low heat build‐up has attracted extensive attention. Furthermore, the trouble to solve the problem of rubber failure caused by tires dynamic heat build‐up is a great challenge faced by the automotive tire industry. In this article, a method of preparing styrene butadiene rubber/carbon black/aramid pulp‐natural rubber latex (SBR/CB/AP‐NRL) composites was described in detail, which used AP coated with NRL to fill SBR/CB. A flexible interface layer was constructed between fibers and rubber matrix, making for forming a large specific surface area of the NRL. The mechanism of reducing heat build‐up of the rubber composite through “deforming transformation” in the flexible interface layer was discussed. In addition, the NRL interface layer contributed to the dispersion of the AP in the rubber matrix and the good interfacial bonding between AP and the rubber matrix. In the experiment of replacing a part of CB with a certain content of AP‐NRL, it was found that the temperature rise of the rubber composites decreased by 8.33% with 1 phr modified AP replacing 5 phr CB. The strategy of reducing dynamic heat build‐up of rubber composite provides a new idea for the development of green tire. Because of the heat generation during the reciprocating deformation of rubber material, the performance and life of rubber material are greatly affected. In this paper, the mechanism of “deforming transformation” is proposed to reduce the dynamic heat and prolong the service life of rubber material. As carbon black is a by‐product of petroleum industry, it will cause pollution to the environment, so reducing the use of carbon black is also an innovation of this paper.