Particle Size Analysis by Chromatography
1980; American Chemical Society; Linguagem: Inglês
10.1021/bk-1980-0138.ch001
ISSN1947-5918
AutoresA. J. McHugh, D. J. Nagy, C. A. Silebi,
Tópico(s)Adsorption, diffusion, and thermodynamic properties of materials
ResumoThe use of column chromatography for fractionating polymer latex suspensions has been growing rapidly. Figure 1 shows a schematic breakdown of the several methods. One method, developed by Small (1,2), involves pumping the latex suspension through columns packed with nonporous beads. Separation by size results from the interaction between the electrostatically stabilized particles and eluant velocity gradients in the interstices between the packing. Thus the term Hydrodynamic Chromatography or HDC has been used to describe the process. Under conditions where van der Waals attraction between the particles and packing can predominate (such as at high eluant ionic strength), the particles may interact with or deposit onto the packing. The possibility exists for controlling the deposition - reintrainment behavior of the particles in this regime, based on either size or any of the physico-chemical parameters involved in the potential energy of interaction between the particles and packing. The term Potential Barrier
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