Han Deshang, Wang Kongshuo, Wang Chuansheng, Han Wenwen
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China.
Shandong Provincial Key Laboratory of Polymer Material Advanced Manufactorings Technology, Qingdao University of Science and Technology, Qingdao 266061, China.
Polymers (Basel). 2022 Jun 8;14(12):2314. doi: 10.3390/polym14122314.
Studies show that the dispersion of silica in the mixing process is an important factor affecting the wear of the mixing chamber. As the most important mixing equipment, the long operational life of the internal mixer will cause wear in the rotor and chamber of the internal mixer. This wear increases the gap between the rotor and chamber of the internal mixer, reduces the mixing performance, weakens the dispersion of packing, and adversely affects the quality of the rubber produced. Therefore, it is important to investigate the metal wear in the mixing process. This article examines the effect of the addition of different amounts of silane coupling agents on metal friction and wear during the mixing process. The silane coupling agent has two functions. The first is to make the surface of the silica hydrophobic, enabling it to combine the inorganic matrix of the silica with the organic matrix of the rubber; the second is to inhibit the aggregation of the silica in the rubber. In the present study, we examine (1) the influence of different formulations on the friction and wear of the metal in the mixing chamber from the perspective of formulation technology, and (2) the correlation between corrosion wear and abrasive wear. It is found that a rubber compound with 6 phr of TESPT has the lowest metal wear and that adding more TESPT does not affect the degree of metal wear. As the amount of TESPT increases, the proportion of abrasive wear decreases, while the proportion of corrosive wear increases, reaching a maximum of 20.7%. In our study we found that abrasive wear is the predominant wear mechanism of a rubber compound on metal. In contrast, the corrosive wear caused by high-temperature water vapor still occupies a large proportion of the total wear. Therefore, improving silica dispersion and reducing abrasive wear are extremely important methods to protect the mixing chamber. However, the corrosion of metals by high-temperature water vapor should also be considered when preparing for the mixing process.
研究表明，二氧化硅在混合过程中的分散性是影响混合室磨损的一个重要因素。作为最重要的混合设备，密炼机的长期运行会导致其转子和腔室出现磨损。这种磨损会增大密炼机转子与腔室之间的间隙，降低混合性能，削弱填料的分散性，并对所生产橡胶的质量产生不利影响。因此，研究混合过程中的金属磨损具有重要意义。本文研究了添加不同量的硅烷偶联剂对混合过程中金属摩擦和磨损的影响。硅烷偶联剂具有两种作用。第一种是使二氧化硅表面具有疏水性，使其能够将二氧化硅的无机基体与橡胶的有机基体结合起来；第二种是抑制二氧化硅在橡胶中的团聚。在本研究中，我们考察了：（1）从配方技术角度出发，不同配方对混合室中金属摩擦和磨损的影响；（2）腐蚀磨损与磨料磨损之间的相关性。研究发现，含有6份TESPT的橡胶配方金属磨损最低，且添加更多的TESPT不会影响金属磨损程度。随着TESPT用量的增加，磨料磨损的比例降低，而腐蚀磨损的比例增加，最高可达20.7%。在我们的研究中发现，磨料磨损是橡胶配方对金属的主要磨损机制。相比之下，高温水蒸气引起的腐蚀磨损在总磨损中仍占很大比例。因此，改善二氧化硅分散性和减少磨料磨损是保护混合室的极其重要的方法。然而，在准备混合过程时，也应考虑高温水蒸气对金属的腐蚀。
