黏土/天然橡胶纳米复合材料在矿用轮胎胎面胶中的应用

用黏土/天然橡胶纳米复合材料代替部分进口天然橡胶和炭黑制备抗崩花掉块和耐破坏的高性能的矿山轮胎胎面胶。结果表明,纳米黏土基本不影响胶料的硫化性能；纳米黏土构建网络结构的能力较强,Payne效应明显,黏土复合体系的混炼胶具有较好的挺性,硫化胶具有较高的硬度和定伸应力；纳米黏土片层能够沿外力方向取向并诱导高分子链取向,黏土复合体系的断裂伸长率较高,拉伸强度和撕裂强度较大,生热较高,同时纳米黏土的片层结构能够钝化支化裂纹尖端,复合体系的耐切割和耐屈挠裂纹增长性能优异。成品轮胎的路试结果表明,黏土/天然橡胶纳米复合材料完全可以代替进口天然橡胶用于矿山专用全钢载重子午线轮胎胎面胶配方中。

Application of clay/natural rubber nanocomposites in tire tread for mine condition

Clay/natural rubber nanocomposites was used to partly replace imported natural rubber and carbon black to improve the cutting and chipping resistance of tire tread for mine condition. The results show that clay has little effect on the cure properties; clay could structure more network and the Payne effect is strong, so the stiff of uncured compound is good and the hardness and module of cured composites is high; clay could slide along the force direction and cause molecular orientation, so the elongation at break is high and tensile strength and tear strength are enhanced; clay could blunt the crack tip, so the cutting and chipping resistance and crack growth resistance is improved. The road test shows that clay/natural rubber nanocomposite is successfully applied in the tire tread.