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TY - THES AU - Hao, Da TI - Kontinuierliche Aufbereitung von Silica gefüllten Kautschukmischungen im Doppelschneckenextruder PB - Aachen, Techn. Hochsch. VL - Dissertation CY - Aachen M1 - RWTH-2015-01661 SP - Getr. Zählung : Ill., graph. Darst. PY - 2015 N1 - Aachen, Techn. Hochsch., Diss., 2015 AB - In this work, the continuous compounding process of silica-based rubber compounds with in-situ silanization was investigated in co-rotating twin screw extruders. In regards to achieving better silica dispersion and a high degree of silanization as well as the removal of the condensation products from the compounding process, the twin-screw extruder has great advantages as an alternative to the internal mixer for the preparation of silica compounds. For a simplified recipe, which contains only silica and no carbon black as filler, the question of the completeness of the silanization can be answered positively for the Ø 44 mm extruder. Time and temperature control are the crucial factors in the mixing process. The optimization process is strongly determined by trade-offs.In the continuous compounding with extruder cascades, complete silanization and good silica dispersion must be ensured. The sequence of compounding stages has a strong influence on the properties of the mixture. It is technologically important that the silanization reaction begins promptly at the start of the mixing process. A complete silanization is the prerequisite for a low viscosity of the silica compound and for the formation of a strong polymer-filler interaction. Shorter residence time, lower energy consumption and comparable mixture properties are the notable advantages of the compounding process in the twin screw extruder.In order to obtain a better understanding of the continuous compounding process, a simulation program, MOREX, is being employed parallel to the extrusion experiments. It can be shown that simulation calculation is very helpful in optimizing the screw configuration and reducing the experimental effort. LB - PUB:(DE-HGF)11 UR - https://publications.rwth-aachen.de/record/465306 ER -