微纳再生胶在轮胎胎侧胶中的应用

Application of micro-nano reclaimed rubber in tire sidewall rubber

将载重子午胎胶粉通过单螺杆反应挤出获得不同再生程度的再生胶,并将其与天然橡胶和顺丁橡胶共混以替代传统典型胎侧胶配方体系中的全部软化剂及部分炭黑,考察再生胶对胎侧胶结构与性能的影响。结果表明,随着再生胶再生程度的提高,其溶胶含量增加,凝胶从几十微米演变为微纳米尺度;胎侧共混胶的硫化效率明显增大,耐老化性能和耐疲劳性能更好,而耐屈挠疲劳性能更是共混传统再生胶的10倍以上,有望用于制备高性能胎侧胶。

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.