Résumé:
In this study, room temperature ionic liquids (RTILs) based on phosphonium cations have been
used as effective compatibilizers of polyolefin/polyamide 6/synthetic talc blends using a melt
extrusion process. Thus, different ionic liquids functionalized by various counteranions
(phosphinate versus bistriflimide) were introduced at various concentrations (1, 5 and 10 wt%)
in the polymer mixtures. Then, the crystallization behaviour, the thermal and mechanical
properties of blends as well as the morphologies were investigated. The transmission electronic
microscopy (TEM) micrographs demonstrated that the use of a very low of ILs (1wt%) led to a
significant reduction of the size of the dispersed PA 6 phase. Moreover, the thermal properties
of PP/PA6/talc was dramatically enhanced (+80 °C) and the mechanical performance was
improved without reducing the strain at break suggesting a synergistic effect between nanotalc
and ionic liquids.
