Elaboration of polypropylene/carbon nanotubes by twin-screw mixer and identification of rheological behavior

This paper focuses on the numerical simulation of the mixing stage of injection molding process, for polypropylene/multi-walled carbon nanotube (PP/MWCNT) nanocomposites. First, a twin-screw mixer had been employed for preparing polypropylene nanocomposites loaded at 2, 5, and 10 wt% of MWCNT. Then,...

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Bibliographic Details
Published inInternational journal of advanced manufacturing technology Vol. 83; no. 9-12; pp. 1659 - 1670
Main Authors Djoudi, H., Gelin, J. C., Barriere, T.
Format Journal Article
LanguageEnglish
Published London Springer London 01.04.2016
Springer Nature B.V
Springer Verlag
Subjects
CAE) and Design
Carbon
Computer simulation
Computer-Aided Engineering (CAD
Engineering
Finite element method
Industrial and Production Engineering
Infrared cameras
Injection molding
Mathematical models
Mechanical Engineering
Mechanics
Media Management
Multi wall carbon nanotubes
Nanocomposites
Original Article
Physics
Polypropylene
Rheological properties
Rheology
Simulation
Temperature distribution
Thermal imaging
Viscosity
Finite element method (FEM)
Carbon nanotubes
Mixing stage modeling
Rheological behavior
Polymers
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Summary:This paper focuses on the numerical simulation of the mixing stage of injection molding process, for polypropylene/multi-walled carbon nanotube (PP/MWCNT) nanocomposites. First, a twin-screw mixer had been employed for preparing polypropylene nanocomposites loaded at 2, 5, and 10 wt% of MWCNT. Then, a characterization of rheological behavior for polypropylene as well as polypropylene/multi-walled carbon nanotube mixtures, at three temperatures (180, 200, and 220 °C,) has been carried out using capillary rheometer, in order to build a consistent flow model. The second part of the paper concerns the design of a transparent front wall for the twin-screw mixer in order to measure the temperature field for the PP in the twin-screw mixer cavity using infrared camera with high-quality thermal imaging. The final part is mainly devoted to the modeling of the polymer-filler flow during the mixing stage using the finite element method. Both PP and MWCNT have been mixed by using a twin-screw mixer. A proper agreement between numerical simulation and experimental results concerning mixing torque and mixing index as well as temperature fields has been obtained.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-7665-2