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Compatibilization of polypropylene/polyamide 6 blends using an ionic liquids/nanotalc combination

Abstract : For several years, many works have demonstrated the potential of nanoparticles, especially organically modified clays (organoclays), as compatibilizing agent for several types of immiscible polymer blends such as PP/PA [1], PET/PE [2] and PC/PMMA [3]. Unfortunately, the majority of the commercially available organoclay used for the compatibilization of polymer blends are not thermally stable and their organo-modifiers degrade easily when used as interfacial agents for polymers exhibiting a high temperature of transformation [4]. For overcome these limitations, ionic liquids have been widely used for this purpose. Due to their thermal stability, non-combustibility, low volatility and other specific properties, they are widely used as modifier agents of layered silicates leading to a better dispersion of clay in the polymer matrix generally coupled with an increase of the final properties, especially thermal and mechanical properties of polymeric materials [5]. Therefore, our approach is to present the ability of using ionic liquids (ILs) to act as new processing aids of PP/PA6 blends filled with 4wt% of nanotalc prepared by extrusion. Ionic liquids based on phosphonium cations but differing by the polarity of their counteranions were introduced at various concentrations (1, 5 and 10wt%) in the polymer blend. The synergistic effect induced by simultaneous presence of ionic liquids and nanotalc on the morphology, crystallization behaviour, thermal and mechanical properties of blends has been studied. It shows that the addition of only 1 wt% of ionic liquids induces a significant decrease of the size of the dispersed polymer phase (PA6 droplets) from 27 µm for the virgin binary PP/PA6 blends to less than 1 µm for PP/PA6/nanotalc/ILs quaternary blends. It is also revealed that the final properties of the blends depend strongly on the polarity and concentration of ionic liquids. When the anion is more hydrophilic, the compatibilization effect is more efficient as revealed by TEM microanalysis. The thermal stability of PP/PA6 blends is also enhanced in the simultaneous presence of ionic liquids and nanotalc in the blend, and depends on the amount of ILs introduced. The stiffness of the blends was significantly improved in the presence of nanotalc/ionic liquid pair without reducing the elongation at break. References [1] M. Gahleitner, B. Kretzschmar, D. Pospiech, E. Ingolic, N. Reichelt, K. Bernreitner. J. Appl. Polym. Sci. 100, 283 (2006). [2] M. Yousfi, J. Soulestin, B. Vergnes, M-F. Lacrampe, P. Krawczak. Macromol. Mater. Eng. 298, 757 (2013). [3] SS. Ray, M. Bousmina. Macromol. Rapid Commun. 26, 450 (2005) [4] M. Yousfi, J. Soulestin, B. Vergnes, M-F. Lacrampe, P. Krawczak. J. Appl. Polym. Sci. 128, 2766 (2013). [5] S. Livi, J. Duchet-Rumeau, P. Thi Nhan, J-F. Gerard. J. Colloid Interface Sci. 354, 555 (2011).
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Contributor : Mohamed Yousfi <>
Submitted on : Wednesday, June 11, 2014 - 8:56:52 AM
Last modification on : Friday, November 27, 2020 - 5:14:05 PM


  • HAL Id : hal-01003957, version 1


Mohamed Yousfi, Sébastien Livi, Jannick Duchet-Rumeau. Compatibilization of polypropylene/polyamide 6 blends using an ionic liquids/nanotalc combination. ISPAC 2014 - 27th International Symposium on Polymer Analysis and Characterization, Jun 2014, Les Diablerets, Switzerland. ⟨hal-01003957⟩



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