Influence of injection molding on the electrical properties of polyamide 12 filled with multi-walled carbon nanotubes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polymer Année : 2014

Influence of injection molding on the electrical properties of polyamide 12 filled with multi-walled carbon nanotubes

Résumé

Microinjection-molded and compression-molded polyamide (PA12) matrix composites filled with 0.67, 1.33, 2 and 4 wt% multi-walled carbon nanotubes (MWNTs) were prepared from twin-screw extruded pellets. The compression molded samples have an electrical percolation threshold close to 1.2 wt%. Coupled rheological and electrical measurements show that their electrical properties start decreasing as soon as shear begins and are partially restored during flow, suggesting successively breakage and reconstruction of a percolating network. On the other hand, the electrical properties of the microinjection molded composites are close to the matrix ones, showing that cooling is too fast for the MWNTs to form a network. There is some electrical anisotropy in these composites, as evidenced by a greater conductivity measured in the flow direction. However polarized Raman spectroscopy analysis does not reveal a significant orientation of the MWNTs.
Fichier principal
Vignette du fichier
PIMM -P-VERSAVAUD-2014.pdf (1.88 Mo) Télécharger le fichier
Format : typeAnnex_author
Loading...

Dates et versions

hal-01096988 , version 1 (18-12-2014)

Identifiants

Citer

Sophie Versavaud, Gilles Regnier, Gwénaël Gouadec, Michel Vincent. Influence of injection molding on the electrical properties of polyamide 12 filled with multi-walled carbon nanotubes. Polymer, 2014, 55, pp.6811-6818. ⟨10.1016/j.polymer.2014.10.038⟩. ⟨hal-01096988⟩
366 Consultations
598 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More