Characterization of rheological behaviors of polypropylene/carbon nanotubes composites and modeling their flow in a twin-screw mixer - Université de Lorraine
Journal Articles Composites Science and Technology Year : 2010

Characterization of rheological behaviors of polypropylene/carbon nanotubes composites and modeling their flow in a twin-screw mixer

Abstract

This paper focuses on the numerical simulation of the polypropylene/multi-walled carbon nanotubes (PP/ MWCNT) flow into a twin-screw mixer, during the mixing phase. The PP/MWCNT behavior obeys an innovating Carreau law enriched temperature built on the rheological properties carried out previously. The polypropylene was mixed with different MWCNTs contents (1, 2, 4 and 8 wt.% of MWCNT content) and the rheological tests were performed at shear rate ranges from 10 À1 to 2 Â 10 4 s À1 at four temperatures (180, 200, 220 and 240 °C). Thus the effects of the temperature and the MWCNTs content on the rheological properties of the PP/MWCNT composites were investigated. The finite element (FEM) analysis of the PP/MWCNT flow allows to compute the velocity, the shear rate and the temperature during the mixing phase period. A good agreement between the experimental measured torque on the screw and the calculated one is shown. Therefore, one can consider that the physical flow is generally well described, awaiting a numerical simulation of the PP/MWCNT mixing phase.

Dates and versions

hal-04342615 , version 1 (13-12-2023)

Identifiers

Cite

F. Thiébaud, J.C. Gelin. Characterization of rheological behaviors of polypropylene/carbon nanotubes composites and modeling their flow in a twin-screw mixer. Composites Science and Technology, 2010, 70 (4), pp.647-656. ⟨10.1016/j.compscitech.2009.12.020⟩. ⟨hal-04342615⟩
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