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Article

3D Numerical Simulation of Reactive Extrusion Processes for Preparing PP/TiO2 Nanocomposites in a Corotating Twin Screw Extruder

1
School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China
2
College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(4), 671; https://doi.org/10.3390/ma12040671
Received: 30 January 2019 / Revised: 15 February 2019 / Accepted: 19 February 2019 / Published: 23 February 2019
To better understand the relationship between flow, mixing and reactions in the process of preparing PP/TiO2, a 3D numerical simulation in a co-rotating twin screw extruder (TSE) was firstly employed using commercial CFD code, ANSYS Polyflow. The effects of rotating speed of screws, stagger angle of knead blocks, inlet flow rate and initial temperature of barrel on the mixing and reaction process in the TSE were investigated. The results reveal that the studied operational and geometric parameters, which determine mixing efficiency, residence time distribution, and temperature of the flows in the TSE, affect the local species concentration, reaction time and reaction rate, and hence have great influences on the conversion rate. The results show that increasing the rotating speed and inlet flow rate can decrease the time for sufficient mixing, which is not conducive to intensive reaction, and increasing the stagger angle has the opposite effect. Moreover, the conversion rate greatly affected by the initial temperature of barrel. View Full-Text
Keywords: twin screw extruder; simulation; residence time distribution; PP/TiO2 nanocomposites; conversion twin screw extruder; simulation; residence time distribution; PP/TiO2 nanocomposites; conversion
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MDPI and ACS Style

Sun, D.; Zhu, X.; Gao, M. 3D Numerical Simulation of Reactive Extrusion Processes for Preparing PP/TiO2 Nanocomposites in a Corotating Twin Screw Extruder. Materials 2019, 12, 671. https://doi.org/10.3390/ma12040671

AMA Style

Sun D, Zhu X, Gao M. 3D Numerical Simulation of Reactive Extrusion Processes for Preparing PP/TiO2 Nanocomposites in a Corotating Twin Screw Extruder. Materials. 2019; 12(4):671. https://doi.org/10.3390/ma12040671

Chicago/Turabian Style

Sun, Dapeng, Xiangzhe Zhu, and Mingguang Gao. 2019. "3D Numerical Simulation of Reactive Extrusion Processes for Preparing PP/TiO2 Nanocomposites in a Corotating Twin Screw Extruder" Materials 12, no. 4: 671. https://doi.org/10.3390/ma12040671

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