Application of low Mooney viscosity reclaimed rubber in passenger car tire tread

Abstract

The recycled rubber with low Mooney viscosity was prepared from waste tire rubber powder by shear method and micro oxygen method and was used in tire tread rubber. The effects of the type and amount of recycled rubber on the curing characteristics, physical and mechanical properties, aging resistance and microstructure of tread rubber were investigated. The results showed that compared with the traditional reclaimed rubber, the positive curing time of the mixture with low Mooney viscosity reclaimed rubber was shortened, the Payne effect was weakened, and the Shore A hardness, 100% and 300% constant tensile stress, tensile strength and aging resistance were slightly improved. The loss factor of vulcanizates decreased at 60 ℃, also decreased slightly at 0 ℃. The reclaimed rubber with low Mooney viscosity had good dispersion in the matrix. The thermal stability and solvent extraction resistance of the vulcanizates prepared by micro oxygen method were better than those prepared by shear method and traditional reclaimed rubber.

Keywords

• waste rubber
• reclaimed rubber with low mooney viscosity
• tread compound
• curing characteristics
• physical and mechanical property
• aging resistance