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Article Dans Une Revue Polymer Année : 2016

Janus hybrid silica/polymer nanoparticles as effective compatibilizing agents for polystyrene/polyamide-6 melted blends

Résumé

Silica/polystyrene Janus hybrid nanoparticles (JHNPs) were synthesized at the gram scale via miniemulsion polymerization technique and then incorporated into polystyrene/polyamide-6 melted blends. Due to their intrinsic amphiphilic properties, the JHNPs migrate to the interface of the PS/PA6 blend during the mixing process and play the role of a compatibilizing agent. First, a significant decrease of the size of the dispersed nodules was observed even at low content of JHNPs, whereas an optimum content of JHNPs corresponding to the saturation of the polystyrene/polyamide-6 (PS/PA6) interface was found in the 3–5 phr range. Secondly, the rheological properties of the blends were also significantly modified. The complex viscosity increased as a function of JHNPs content over the entire frequency range studied. Up to 5 phr of JHNPs, a high increase of the viscosity at low frequencies was observed. This is attributed to the formation of a solid network through the matrix/nodules interface of the nanocomposite. Finally, the Palierne model extended to the field of immiscible polymer blends was used; an important decrease of the effective interfacial tension of the system was observed when JHNPs were added. The asymmetry of these nanoparticles allows the combination of a “Pickering effect” of a solid particle with a “copolymer effect” of an amphiphilic structure. The synthesis procedure of JHNPs developed in this work renders these silica/polymer JHNPs interesting as a route for the compatibilization of polymer blends.
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Dates et versions

hal-02906427 , version 1 (07-01-2021)

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Citer

T. Parpaite, B. Otazaghine, A. S. Caro-Bretelle, A. Taguet, R. Sonnier, et al.. Janus hybrid silica/polymer nanoparticles as effective compatibilizing agents for polystyrene/polyamide-6 melted blends. Polymer, 2016, 90, pp.34-44. ⟨10.1016/j.polymer.2016.02.044⟩. ⟨hal-02906427⟩
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