{"title":"Modeling and practice of ethanol-devolatilization of silica-silane rubber compounds in an internal mixer","authors":"W. Dierkes","doi":"10.1163/EJ.9789067644525.I-410.35","DOIUrl":null,"url":null,"abstract":"During mixing of a silica-silane rubber compound, the mixer is not only used for dispersion, but also for a chemical reaction. A good dispersion is reached by high shearing forces, preferably applied at lower temperatures, whereas the reaction rate of the silanization is increased with increasing temperature, but at the expense of scorch safety. Another limiting factor for the silanization reaction is the ethanol concentration, requiring effective devolatilization of the compound. A model for the devolatilization of a silica compound in an internal mixer is theoretically derived and experimentally verified. The most important factors are identified: the frequency of surface renewal and the surface-to-volume ratio of the compound as well as a low ethanol pressure in the void space of the mixer are the main contributors.","PeriodicalId":17772,"journal":{"name":"Kgk-kautschuk Gummi Kunststoffe","volume":null,"pages":null},"PeriodicalIF":0.4000,"publicationDate":"2007-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Kgk-kautschuk Gummi Kunststoffe","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1163/EJ.9789067644525.I-410.35","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 6
Abstract
During mixing of a silica-silane rubber compound, the mixer is not only used for dispersion, but also for a chemical reaction. A good dispersion is reached by high shearing forces, preferably applied at lower temperatures, whereas the reaction rate of the silanization is increased with increasing temperature, but at the expense of scorch safety. Another limiting factor for the silanization reaction is the ethanol concentration, requiring effective devolatilization of the compound. A model for the devolatilization of a silica compound in an internal mixer is theoretically derived and experimentally verified. The most important factors are identified: the frequency of surface renewal and the surface-to-volume ratio of the compound as well as a low ethanol pressure in the void space of the mixer are the main contributors.
期刊介绍：
KGK is the only bilingual trade and technical magazine in the world focusing on development, processing and applications in the caoutchouc, rubber and plastics industry.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
