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Dispersion mechanisms of carbon black in an elastomer matrix

Abstract : 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.
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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⟩

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