Abstract
Abstract Carbon blacks are made up of near-spherical elementary colloidal particles chained together in small clusters known as aggregates. These unique morphological characteristics have complicated their particle size characterization by conventional techniques. In this study the potential of mercury porosimetry for the generation of primary particle size distributions (PPSD) of carbon blacks is investigated. Two literature theories (Mayer—Stowe and Smith—Stermer) were applied to derive PPSD curves from mercury porosimetry analyses of six ASTM standard reference blacks (series SRB A5-F5) covering a wide range of particle sizes. Good agreement was found between particle sizes expected from electron microscopy and those determined by mercury porosimetry. The advantages of the latter technique for the routine evaluation of continuous PPSD curves are discussed.
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