Dispersion behavior of heterogeneous agglomerates at supercritical stresses

✍ Scribed by Steven W. Horwatt; Manas-Zloczower; D.L. Feke

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 571 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)80303-t

✦ Synopsis

The influence of structural heterogeneities on the dispersion behavior of agglomerates at stresses in excess of the minimum for breakup was investigated. The fragmentation behavior of heterogeneous structures, simulated by a variety of standard agglomeration algorithms, was analyzed for the case of simple shear flow. A power-law correlation between the average fragment size and the level of stress applied was exhibited by al1 the structures investigated. Similar power-law behavior has been experimentally observed for the dispersion of agglomerates of polystyrene latex spheres in water and for the breakup of carbon black agglomerates in poly(dimethy1 siloxane). The power-law exponent was found to increase with the agglomerate fractal dimension. The results obtained in this work indicate that the fractal dimension is not suflicient to predict dispersion behavior for nearly dense structures.