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首页> 外文会议>Technical Meeting of the Rubber Division, American Chemical Society >Functionalized SBRs in Silica-reinforced Hardness-adjusted Tire Tread Compounds: Interactions with Filler and Zinc Oxide
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Functionalized SBRs in Silica-reinforced Hardness-adjusted Tire Tread Compounds: Interactions with Filler and Zinc Oxide

机译：二氧化硅增强硬度调节轮胎胎面化合物中的官能化SBR：与填料和氧化锌的相互作用

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The silica/silane system is nowadays well established in the passenger car tire tread. The use of this system leads in combination with a SSBR/BR blend to a significant improvement in wet traction and rolling resistance by maintaining the same abrasion resistance compared to the traditionally used carbon black. But due to the fact that silica is polar and naturally not compatible with non-polar hydrocarbon elastomers, a compatibilizer has to be additionally introduced. Silane coupling agents are added to the compound to couple first during the mixing process to the silica and second during the vulcanization phase to the polymer. An alternative is the introduction of polar functional groups or chemically reactive groups into the elastomer chains which can give improved compatibility of elastomers with the silica. In this article, the effect of silica-filled compounds of two functionalized SBRs, one backbone modified with carboxylate moieties and the other one modified with dithiol groups, on the dynamic and mechanical properties of a silica-reinforced tire tread compound will be discussed and compared to a reference compound which contains unmodified s-SBR as the main polymer. Zinc oxide is known as the best activator for sulfur vulcanization. Zn-ions combine with accelerators to form an active complex which catalyzes the vulcanization process. However, in silica filled compounds, ZnO may interfere with the silanization process due to its alkaline nature, and it may compete with the silanes in reacting with the acidic-OH groups on the surface of silica particles. When functionalized SBRs with higher polarity are used in silica compounds, ZnO may interact with these moieties as well. In order to investigate the effect of ZnO on the properties of the silica-reinforced tread compound, a series of compounds have been prepared, in which ZnO addition in a later stage was compared to conventional mixing. This leads to promising results favoring rolling resistance of tires made thereof, but brings along lower hardness values, which can affect other properties of the compounds, such as tire traction which leads to misinterpretations. Therefore, compounds with adjusted hardness are prepared through an oil adjustment. Dynamic and mechanical properties of these compounds are studied and compared with the original data without hardness adjustment.
机译：如今，二氧化硅/硅烷系统在乘用车轮胎胎面上很好地建立。通过将与传统使用的炭黑相比保持相同的耐磨性，使用该系统的使用与SSBR / BR混合在湿牵引力和滚动阻力的显着改善。但由于二氧化硅是极性的，并且天然不与非极性烃弹性体与非极性不相容，必须另外引入增容剂。在混合过程中将硅烷偶联剂加入到化合物中以将二氧化硅和第二在硫化相期间至聚合物期间。替代方案是将极性官能团或化学反应基团引入弹性体链中，其可以提高弹性体与二氧化硅的相容性。在本文中，将讨论并比较二氧化硅部分的二氧化硅填充的SBR化合物，用羧酸酯部分改性的另一个用羧酸酯部分改性的骨架，并进行比较和比较二氧化硅增强轮胎胎面化合物的动态和机械性能。含有未修饰的S-SBR作为主要聚合物的参考化合物。氧化锌被称为硫化硫化的最佳活化剂。 Zn-离子与促进剂结合，形成催化硫化过程的活性复合物。然而，在二氧化硅填充的化合物中，ZnO可能因其碱性性而干扰硅烷化过程，并且它可以与硅烷与硅烷与二氧化硅颗粒表面上的酸性-OH基团反应。当具有更高极性的官能化SBR在二氧化硅化合物中使用时，ZnO也可以与这些部分相互作用。为了探讨ZnO对二氧化硅增强胎面化合物的性质的影响，已经制备了一系列化合物，其中将在后期的ZnO加入与常规混合进行比较。这导致有利于其制造的轮胎的滚动阻力的承诺结果，但是沿着低硬度值引起，这可能影响化合物的其他性质，例如轮胎牵引，这导致误解。因此，通过调节制备具有调节硬度的化合物。研究了这些化合物的动态和力学性能，并与原始数据进行比较，无需硬度调节。

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