The Effect of the Functionalisation of Low-Dispersion Carbon Black of the OMCARB Series by Hydrogen Peroxide on the Properties of Filled Composites

G. V. Moiseevskaya, G. I. Razd’yakonova, A. Petin
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Abstract

The aim of this work was to produce a new filler for polymers in which a low surface activity is combined with a high degree of structure and functionalisation of the surface, which will bring the processing properties of filled rubber mixes closer to the properties of rubber mixes with channel carbon black. The oxidation of specimens of low-dispersion, highly structured carbon black of grade OMCARB S820 was carried out using aqueous solutions of hydrogen peroxide of different concentration. Using a combination of methods, including X-ray diffraction analysis (D8 Advance diffractometer; Bruker, Germany) and transmission electron microscopy (JEM 2100 electron microscope; JEOL, Japan), we assessed the physicochemical properties and the form and the number of oxygen-containing groups (carboxyl, phenolic, lactone) on the surface of a particle of oxidised S820 in comparison with carbon black K354 (produced by the Khazar Chemical Plant, Turkmenistan) and semi-active furnace black N550 (produced by Omsktekhuglerod). The rheological characteristics (MDR 3000 vibrorheometer and MV 3000 viscometer; MonTech, Germany) and the physicomechanical characteristics (tensometer; Shimadzu, Japan) of rubber mixes filled with these blacks and of rubber compounds based on natural rubber were determined. The dynamic properties of the rubber compounds and the glass transition temperatures were determined on a DMA 242D instrument (Netzsch, Germany). Comparative data on the temperature dependence of the mechanical loss tangent (tg δ) of the rubber compounds showed that at temperatures of −60 and +60°C the greatest differences are possessed by rubber compounds with K354. At intermediate temperatures, the tg δ values for rubber compounds with the different fillers are similar. The new carbon black was advantageous with respect to the strength properties and dynamic characteristics of the rubber compounds, retaining the unique properties of composites filled with channel black.
过氧化氢对OMCARB系列低分散炭黑功能化对填充复合材料性能的影响
这项工作的目的是为聚合物生产一种新的填料,在这种填料中,低表面活性与高度的表面结构和功能化相结合,这将使填充橡胶混合物的加工性能更接近通道炭黑橡胶混合物的性能。采用不同浓度的双氧水溶液对OMCARB S820级低分散、高结构炭黑试样进行了氧化实验。采用多种方法,包括x射线衍射分析(D8 Advance衍射仪;Bruker,德国)和透射电子显微镜(JEM 2100电子显微镜;JEOL,日本),我们评估了氧化S820颗粒表面的物理化学性质以及含氧基团(羧基,酚类,内酯)的形式和数量,并与炭黑K354(由土库曼斯坦Khazar化工厂生产)和半活性炉黑N550(由Omsktekhuglerod生产)进行比较。流变特性(MDR 3000振动流变仪和mmv 3000粘度计;MonTech,德国)和物理力学特性(tensometer;测定了填充这些黑色的橡胶混合料和以天然橡胶为基础的橡胶化合物的含量。橡胶化合物的动态性能和玻璃化转变温度在DMA 242D仪器(Netzsch,德国)上测定。橡胶化合物的机械损耗切线(tg δ)的温度依赖性比较数据表明,在−60℃和+60℃时,含K354的橡胶化合物具有最大的差异。在中等温度下,不同填料的橡胶化合物的tg δ值相近。新炭黑在橡胶化合物的强度性能和动态特性方面具有优势,保留了通道黑填充复合材料的独特性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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