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BRIDGING MICROSTRUCTURE, PROPERTIES, AND PROCESSING OF POLYMER-BASED ADVANCED MATERIALS

Dynamic Compressive Behavior of a Melt Mixed Polypropylene/Organoclay Nanocomposites

[+] Author and Article Information
Kui Wang

 Institut de Mécanique des Fluides et des Solides, IMFS University of Strasbourg, Strasbourg, 2 rue Boussingault, 67000 Strasbourg, France

Rodrigue Matadi Boumbimba

 Institut de Mécanique des Fluides et des Solides, IMFS University of Strasbourg, Strasbourg, 2 rue Boussingault, 67000 Strasbourg, France; Laboratoire d’Ingénierie des Polymères pour les Hautes Technologies, ECPM-LIPHT, University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, Cedex 2, France

Nadia Bahlouli

 Institut de Mécanique des Fluides et des Solides, IMFS University of Strasbourg, Strasbourg, 2 rue Boussingault, 67000 Strasbourg, France

Saïd Ahzi1

 Institut de Mécanique des Fluides et des Solides, IMFS University of Strasbourg, Strasbourg, 2 rue Boussingault, 67000 Strasbourg, Franceahzi@unistra.fr

René Muller, Michel Bouquey

 Laboratoire d’Ingénierie des Polymères pour les Hautes Technologies, ECPM-LIPHT, University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, Cedex 2, France

1

Corresponding author.

J. Eng. Mater. Technol 134(1), 010905 (Dec 12, 2011) (11 pages) doi:10.1115/1.4005420 History: Received June 14, 2011; Revised October 10, 2011; Accepted October 15, 2011; Published December 12, 2011; Online December 12, 2011

This work aims to investigate the dynamic behavior of polypropylene organoclay nanocomposites. The nanocomposite was obtained by mixing the polypropylene matrix with a masterbatch of polypropylene modified anhydride maleic and montmorillonite organoclay (pp-nanocor). The dynamic behavior was investigated by using split Hopkinson pressure bars, at different strain rates and different temperatures. The obtained nanocomposite exhibits a good dispersion and a partially exfoliated morphology. To study the effect of nanocomposite dispersion and morphology on the dynamic behavior, another nanocomposite was prepared by melt mixing of polypropylene and a modified montmorillonite (dellite) (PP dellite). The dynamic property results for PP-nanocor show an increase of both Young’s modulus and yield stress with the increasing organoclay concentration. However, PP-dellite nanocomposites present poor mechanical properties compared with those of PP-nanocor.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Split Hopkinson pressure bars setup

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Figure 2

TEM image of PP nanocor 0.5% and PP nanocor 6% nanocomposites at low magnification showing a good dispersion of the organoclay in PP matrix

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Figure 3

TEM images of PP nanocor nanocomposites with various organoclay contents at high magnification

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Figure 4

TEM images of PP-nanocor 6 wt. % and PP-Dellite 6 wt. %

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Figure 5

XRD patterns of the organoclay (Dellite67G), the masterbatch (Nanomax) and the nanocomposites at different organoclay concentrations

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Figure 6

Experimental true stress versus true strain curves under uniaxial compression loading of pure polypropylene and the polypropylene organoclay nanocomposite 3% (PP-nanocor 3%) at 20 °C and 60 °C for four true strain rates

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Figure 7

Experimental true stress versus true strain curves under uniaxial compression loading at 20 °C for four true strain rates and various organoclay concentrations

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Figure 8

Experimental true stress versus true strain curves under uniaxial compression loading at 40 °C for four true strain rates, and various organoclay concentrations

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Figure 9

Experimental true stress versus true strain curves under uniaxial compression loading at 60 °C with four true strain rates, and various organoclay concentrations

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Figure 10

Experimental true stress versus true strain curves under uniaxial compression loading at 80 °C with four true strain rates, and various organoclay concentrations

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Figure 11

Scanning electron micrographs of section for non tested PP nanocor 6% and PP Dellite 6%

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Figure 12

The dependence of Young’s modulus in dynamic compression on strain rate at four temperatures

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Figure 13

The dependence of yield stress in dynamic compression on strain rate at four temperatures

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