Dispersion mechanisms of carbon black in an elastomer matrix

Véronique Collin (1) , Edith Peuvrel-Disdier (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

Dispersion mechanisms of carbon black pellets in an uncured SBR elastomer matrix under shear conditions were studied using a rheo-optical approach. A transparent counter-rotating plate-and-plate shear cell coupled with an optical microscope was used. Elementary mechanisms of dispersion such as rupture, erosion of isolated carbon black pellets were investigated. A criterion for rupture and an erosion law were determined. The rupture mechanism was shown to be governed by a critical shear stress which is inversely proportional to the pellet size. The erosion mechanism was found to be characterized by a constant eroded volume per strain unit. The eroded volume was shown to be independent of the initial pellet size but to depend on the applied shear stress and the strain.

Mots clés: Carbon black; elastomer; dispersion; shear; rheo-optics

Domaines: Matériaux

Véronique Collin, Edith Peuvrel-Disdier. Dispersion mechanisms of carbon black in an elastomer matrix. Elastomery, 2005, 9 (No Special), pp.Pages 9-15. ⟨hal-00663087⟩