Application of micro-nano reclaimed rubber in tire sidewall rubber

Abstract

The truck tire rubber powder was reclaimed through a single screw extruder and then reclaimed rubber with different reclaiming degrees was obtained. After being blended with natural rubber/cis-1,4-polubutadiene rubber to replace all the sof-teners and part of the carbon black in the traditional typical sidewall formula, its influences on the structure and performance of sidewall rubber were also discussed. The results showed that as the reclaiming degree increased, the sol content of reclaimed rubber increased, and the gel particles of reclaimed rubber evolved from tens of microns to micro-nano scale. Moreover, the vulcanization efficiency of the blend increased significantly with better aging resistance and flexing fatigue resistance which was more than ten times that of the traditional reclaimed rubber. It was expected to be used in the preparation of high-performance sidewall rubber.

Keywords

• reclaimed rubber
• tire sidewall rubber
• gel particle size
• flex fatigue resistance