As the principal reinforcement filler, carbon black (CB) has been used in the rubber industry for over a century. However, the poor dispersity of CB in rubber matrices is still a bottleneck for preparing high-performance CB-filled rubber composites. In this contribution, we utilized the triazolinedione (TAD)-ene click chemistry to introduce the active urazole groups onto the natural rubber (NR) chains. The grafted urazole groups could be converted to the stable urazole radicals through the transformation from rubber macroradicals or under thermal oxidation and then trapped by CB to form the covalent interaction between rubber and CB. The enhanced interfacial interaction greatly improves the dispersion of CB in the NR matrix, leading to a significantly suppressed filler network. With a suitable TAD grafting ratio, the modulus and the wet-traction of NR/CB composite are improved, meanwhile the rolling resistance is strikingly reduced, which is very promising for the application of energy-saving tires.

中文翻译：

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通过三唑啉二酮点击化学可显着改善高性能天然橡胶复合材料的炭黑分散性

作为主要的补强填充剂，炭黑（CB）在橡胶工业中使用了一个多世纪。然而，CB在橡胶基质中的分散性差仍然是制备高性能CB填充橡胶复合材料的瓶颈。在这项贡献中，我们利用三唑啉二酮（TAD）-烯点击化学将活性脲基引入天然橡胶（NR）链上。通过接枝橡胶基团或在热氧化作用下，接枝的脲基可转变为稳定的脲基，然后被CB捕获，形成橡胶与CB之间的共价相互作用。增强的界面相互作用极大地改善了CB在NR基质中的分散性，从而显着抑制了填充剂网络。使用合适的TAD接枝率，