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Xanthate-modified silica as a novel multifunctional additive for properties improvement of natural rubber
Composites Science and Technology ( IF 9.1 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.compscitech.2020.108567
Kaizheng Zhu , Yu Liu , Heliang Wang , Xiwei Guo , Shuangquan Liao , Zhifen Wang , Lin Fang

Abstract Reinforcing agents and accelerators are the most important auxiliaries for rubber industry. In this paper, ceric ammonium nitrate (CAN), for the first time, worked as a catalyst for hydroxyl groups in silica to prepare silica grafted sodium xanthate (SSX), which was used as an in-situ modified multifunctional rubber additive in this work. Compared with sodium isobutyl xanthate (SIBX), SSX has enhanced the initial and final degradation temperatures, achieving the improvement of 103°C and 277°C, respectively. Notably, owing to the powerful interaction between each component, SSX can be homogeneously dispersed in the natural rubber (NR) matrix in contrast to the seriously aggregated silica. Meanwhile, NR/SSX composites exhibited superior curing properties and showed an increase of 29.1% and 33.4% in the tensile strength and tear strength, respectively, compared to that of traditional 2-mercaptobenzothiazole (MBT) system. Since high-performance rubber composites can be obtained by introducing SSX, we believe that this work can provide a novel and facile approach to prepare natural silicate minerals-based vulcanization accelerators.

中文翻译:

黄原酸酯改性二氧化硅作为一种新型多功能添加剂用于改善天然橡胶的性能

摘要 增强剂和促进剂是橡胶工业最重要的助剂。在本文中,硝酸铈铵(CAN)首次作为二氧化硅中羟基的催化剂制备了二氧化硅接枝黄原酸钠(SSX),在本工作中用作原位改性多功能橡胶添加剂. 与异丁基黄原酸钠 (SIBX) 相比,SSX 提高了初始和最终降解温度,分别提高了 103°C 和 277°C。值得注意的是,由于每个组分之间的强大相互作用,与严重聚集的二氧化硅相比,SSX 可以均匀地分散在天然橡胶 (NR) 基质中。同时,NR/SSX复合材料表现出优异的固化性能,拉伸强度和撕裂强度分别提高了29.1%和33.4%,分别与传统的 2-巯基苯并噻唑 (MBT) 系统相比。由于通过引入SSX可以获得高性能橡胶复合材料,我们相信这项工作可以为制备天然硅酸盐矿物基硫化促进剂提供一种新颖而简便的方法。
更新日期:2021-02-01
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