Stubble resistance of tread rubber vulcanizate of a tyre is crucial, especially for the off-the road (OTR) tyres. However, it has not been vividly discussed in the literature. Here, we developed a test method for stubble resistance, and studied the effect of short aramid fibre and two different types of resins on the stubble resistance of a conventional tire tread recipe with a view to its improvement. Resin filled compositions, being flexible, showed better cut initiation resistance, as compared to aramid fibre filled stiffer compositions, by dissipating the stress through chain orientation. During penetration, both cut growth and frictional force were important. For the aramid fibre composition, the frictional force dominated, whereas the cut growth was predominant for the resin filled vulcanizates. How the different energies associated with the fracture, e.g. cut initiation and growth energies, frictional energy and total fracture energy, altered with respect to the modulus or elongation at break of the rubber vulcanizates has also been discussed. At 4–6 phr of aramid filler concentration, stubble resistance drastically improved. On the other hand, the resin at 4 phr concentration exhibited an overall improvement in stubble resistance as compared to the conventional recipe. In summary, the present work contributed to the effect of different parameters on the stubble resistance of a tire tread rubber vulcanizate using an inhouse developed new test method.

轮胎的胎面胶硫化胶的抗残茬性至关重要，尤其是对于越野（OTR）轮胎。但是，它在文献中没有被生动地讨论过。在这里，我们开发了一种抗结垢性的测试方法，并研究了短芳族聚酰胺纤维和两种不同类型的树脂对常规轮胎胎面配方的抗结垢性的影响，以期对其进行改进。与芳族聚酰胺纤维填充的较硬的组合物相比，柔性树脂填充的组合物通过通过链取向来分散应力，从而显示出更好的抗切割起始性。在穿透过程中，切削增长和摩擦力都很重要。对于芳族聚酰胺纤维组合物，摩擦力占主导，而树脂填充的硫化橡胶主要是切割增长。还讨论了与断裂相关的不同能量（例如，切割起始和增长能量，摩擦能和总断裂能）如何相对于橡胶硫化橡胶的断裂模量或断裂伸长率发生变化。在芳族聚酰胺填料浓度为4-6 phr时，耐残茬性大大提高。另一方面，与常规配方相比，浓度为4 phr的树脂在抗残茬性上总体上有所改善。总而言之，本研究使用内部开发的新测试方法，对不同参数对轮胎胎面胶硫化胶的抗留茬性的影响做出了贡献。还讨论了关于橡胶硫化橡胶的模量或断裂伸长率变化的方法。在芳族聚酰胺填料浓度为4-6 phr时，耐残茬性大大提高。另一方面，与常规配方相比，浓度为4 phr的树脂在抗残茬性上总体上有所改善。总而言之，本研究使用内部开发的新测试方法，对不同参数对轮胎胎面胶硫化胶的抗留茬性的影响做出了贡献。还讨论了关于橡胶硫化橡胶的模量或断裂伸长率的改变。在芳族聚酰胺填料浓度为4-6 phr时，耐残茬性大大提高。另一方面，与常规配方相比，浓度为4 phr的树脂在抗残茬性上总体上有所改善。总而言之，本研究使用内部开发的新测试方法，对不同参数对轮胎胎面胶硫化胶的抗留茬性的影响做出了贡献。