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首页> 外文会议>International Elastomer Conference >TAILORING NATURAL RUBBER/BUTADIENE RUBBER COMPOUNDS CONTAINING A HYBRID CARBON BLACK-SILICA FILLER FOR AIRCRAFT TIRE TREADS: THE EFFECT OF ZINC OXIDE AND DPG ADDITION SEQUENCE ON COMPOUND PROPERTIES AND HYSTERESIS
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TAILORING NATURAL RUBBER/BUTADIENE RUBBER COMPOUNDS CONTAINING A HYBRID CARBON BLACK-SILICA FILLER FOR AIRCRAFT TIRE TREADS: THE EFFECT OF ZINC OXIDE AND DPG ADDITION SEQUENCE ON COMPOUND PROPERTIES AND HYSTERESIS

机译：含有用于飞机轮胎的杂种碳黑二氧化硅填料的剪裁天然橡胶/丁二烯橡胶化合物：氧化锌和DPG加法序列对化合物性能和滞后的影响

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The properties needed for aircraft tire treads are significantly different from the ones required for passenger car or truck tires, for which improvements mainly focus on a better balance of rolling, wet skid and wear resistance. Aircraft tires experience severe operation conditions during service: The temperature can reach above the critical temperature of polymers, thus accelerating tread wear. To reduce the peak temperatures of the tire tread during departure and landing, the material of the tread should have a low hysteresis. Moreover, the tires need to be able to withstand high loads and impact during landing. Therefore they also require outstanding strength properties and reversion resistance. This paper focuses on the influence of the processing sequence of ZnO and DPG on the properties mentioned above. It is based on a blend of natural and butadiene rubber reinforced with hybrid carbon black-silica fillers. From this study, we found that the ZnO addition sequence has a strong influence on the properties of rubber compounds, while the DPG addition sequence has almost no effect. The incorporation of ZnO in the first stage of mixing results in low Mooney viscosity, better silica dispersion, slow cure rate but high reversion resistance and high mechanical properties. When ZnO was omitted during the first stage of mixing and added in the last stage of mixing, it resulted in high filler-polymer interaction, which is beneficial for high stress-strain properties. However, the latter compounds were prone to reversion under prolonged vulcanization leading to a significant reduction of the modulus at 300% elongation and crosslink density. Finally, the addition sequence of ZnO and DPG does not influence the hysteresis. The energy loss (hysteresis) of the compounds is influenced by the filler-filler and filler-polymer interaction as well as crosslink density. These properties vary with mixing procedure; i.e., adding ZnO in the first stage of mixing shows low filler-filler interaction but also low filler-polymer interaction, while adding ZnO in the last stage of mixing results in high Payne effect but also high filler-polymer interaction. In case of the degree of crosslinking, all compounds exhibit a similar level.
机译：飞机轮胎胎面所需的性质与乘用车或卡车轮胎所需的性质有很大差异，其改进主要关注滚动，湿滑和耐磨性的更好平衡。飞机轮胎在维修期间经历严重的操作条件：温度可达到聚合物的临界温度，从而加速胎面磨损。为了降低出发和着陆期间轮胎胎面的峰值温度，胎面的材料应该具有低滞后。此外，轮胎需要能够承受着陆期间的高负荷和冲击。因此，它们还需要出色的强度性能和逆转性。本文重点介绍了ZnO和DPG加工序列对上述性质的影响。它基于用杂交炭黑二氧化硅填料加固的天然和丁二烯橡胶的混合物。从本研究开始，我们发现ZnO添加序列对橡胶化合物的性质产生了强烈影响，而DPG加成序列几乎没有效果。在混合的第一阶段中掺入ZnO导致低门尼粘度，更好的二氧化硅分散体，缓慢固化率，但高逆转性和高机械性能。当在混合混合的第一阶段省略ZnO时，它导致高填料 - 聚合物相互作用，这对于高应力 - 应变性能有益。然而，后一种化合物在延长硫化下易于逆转，导致模量在300％的伸长和交联密度下显着降低。最后，ZnO和DPG的添加序列不会影响滞后。化合物的能量损失（滞后）受填料填料和填料 - 聚合物相互作用以及交联密度的影响。这些属性随混合程序而异;即，在混合第一阶段中加入ZnO显示出低填充填料相互作用，而且还具有低填料 - 聚合物相互作用，同时在混合的最后阶段加入ZnO，结果高payne效果，但也具有高填料 - 聚合物相互作用。在交联度的情况下，所有化合物都表现出类似的水平。

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