The structure of isoamyl rubber is similar to that of natural rubber, and it is an excellent substitute for natural rubber, which is widely used in aerospace, national defense and biomedical fields. Although the composition and physical properties of rare earth isoprene rubber are most similar to those of natural rubber, its impact strength and tear resistance are usually poor due to the lack of non-rubber components (biological macromolecules such as proteins, phospholipids and polysaccharides). In recent years, researchers modified isoprene rubber by block copolymerization and biomimetic modification, improved the comprehensive properties of isoprene rubber, and prepared new biomimetic rubber.
With the advent of green tires, Silica is widely used for tire tread. Because the hydroxyl group on the surface of white carbon black forms a hydrogen bond with the hydrogen atom on the rubber molecular chain, the interaction between the filler and the rubber is enhanced, the movement of the rubber molecular chain is limited, and the internal structure of the rubber material is improved, and the dynamic and static properties such as dispersibility, tear resistance and modulus are improved. In addition, green tires can effectively enhance skid resistance and reduce rolling resistance, resulting in lower fuel consumption and higher driving safety. However, due to the polarity difference between the white carbon black and rubber surfaces, the binding between the white carbon black and the elastomer interface is insufficient. Silica black surface has a large number of highly polar silanol groups, these silanol groups enhance the interaction between fillers and fillers, so it is difficult to disperse silica in non-polar rubber and obtain sufficient interface compatibility. In order to reduce these negative effects, a certain proportion of silane coupling agent is usually added to improve the dispersion and crosslinking density. However, the use of white carbon black as the only reinforcing agent will increase the production cost and reduce the wear resistance and electrostatic properties of the tire. Therefore, in the tire industry, silica and carbon black (CB) fillers are often mixed to reinforce rubber to achieve optimal performance and cost effectiveness.
