Molecular mobility in piezoelectric hybrid nanocomposites with 0-3 connectivity: Particles size influence

Jean-Fabien Capsal (1) , Eric Dantras (1) , Jany Dandurand (1) , Colette Lacabanne (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Polyamide 11/barium titanate nanocomposites have been studied by a combination of dynamic dielectric spectroscopy, thermo stimulated current and differential scanning calorimetry. The correlation between results obtained by dielectric and calorimetric methods allows us to describe the evolution of the physical structure of the hybrid nanocomposites. The molecular mobility of 0-3 connectivity nanocomposites has been explored. The influence of the nanoparticles size is specifically studied. The smaller sized fillers produce a shift of the relaxation modes observed above the glass transition temperature of polyamide 11 towards lower frequency. The increase of the organic/inorganic interface induces an increase of the ratio rigid amorphous phase/soft amorphous phase. The interfaces favour local ordering stabilized by hydrogen bonds at a nanometric scale.

Mots clés: Dynamic dielectric spectroscopy; Thermostimulated currents; Hybrid nanocomposites; Molecular mobility

Domaines: Matériaux; Matériaux

Jean-Fabien Capsal, Eric Dantras, Jany Dandurand, Colette Lacabanne. Molecular mobility in piezoelectric hybrid nanocomposites with 0-3 connectivity: Particles size influence. Journal of Non-Crystalline Solids, 2011, 357 (2), pp.587-593. ⟨10.1016/j.jnoncrysol.2010.06.037⟩. ⟨hal-03544262⟩