ABSTRACT

In this study, solution grade styrene–butadiene rubber (SSBR) compound was prepared by partial replacement of silica with lignin. The compounds were designed and optimised using an L9 orthogonal array (using Taguchi method) targeting ‘magic triangle’. Cure rate index (CRI), reinforcement index (RI) and hysteresis loss (loss tangent at 60°C) were considered as the responses. Thermo-gravimetric analysis and Differential scanning calorimeter is used to assess thermal degradation and intramolecular reactivity of lignin. Morphological analysis of the composites has instituted the fact that above 20% replacement of synthetic silica by lignin results in re-agglomeration of filler particles due to inferior dispersion. Response analysis through ANOVA coupled with an experimental study on physico-mechanical and dynamic-mechanical properties has manifested that SSBR with 58% vinyl content with 40:10 silica: lignin compounded at 160°C with 10% silane coupling agent (SCA) with respect to silica at factorial levels furnished a ‘magic triangle’ optimised tyre tread compound.

摘要

在这项研究中，溶液级丁苯橡胶 (SSBR) 化合物是通过用木质素部分替代二氧化硅制备的。这些化合物是使用 L9 正交阵列（使用田口方法）针对“魔三角”设计和优化的。固化率指数 (CRI)、强化指数 (RI) 和滞后损失（60°C 下的损耗角正切）被视为响应。热重分析和差示扫描量热仪用于评估木质素的热降解和分子内反应性。复合材料的形态分析表明，木质素替代合成二氧化硅超过 20% 会导致填料颗粒因分散性差而重新团聚。