Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/8326
Title: | Measurement of Particle Size in the Submicron Range - Evaluation of Liquid Exclusion Chromatography (LEC) |
Authors: | Singh, Surendra |
Advisor: | Hamielec, A.E. |
Department: | Chemical Engineering |
Keywords: | Chemical Engineering;Chemical Engineering |
Publication Date: | Oct-1977 |
Abstract: | <p>Herein is reported a theoretical and experimental evaluation of liquid exclusion chromatography (LEC) for the measurement of particle size distribution (PSD) and diameter averages for colloidal spheres of various compositions.</p> <p>Correction factors for axial dispersion have been derived for a general detector whose signal is proportional to the number of particles time particle diameter to the power gamma (γ) where γ varies from zero to six. This general detector includes a turbidimeter (γ=6) and a refractometer (γ=3).</p> <p>Equipment and operational variables and their effect on resolution were investigated experimentally. These included packing and pore sizes, bed length and carrier liquid flowrate.</p> <p>The use of LEC for the off-line monitoring of the growth of latex particles was investigated for the surfactant-free emulsion polymerization of two monomer systems-styrene and vinyl acetate.</p> <p>LEC can be used to quantitatively measure the size distribution and diameter averages of both organic latices and inorganic particles in the submicron range in an off-line analytical mode. LEC is sufficiently rapid for the off-line monitoring of latex particle growth in emulsion polymerization. With some modification it could be used in an online mode as a sensor for reactor control.</p> |
URI: | http://hdl.handle.net/11375/8326 |
Identifier: | opendissertations/354 1260 889910 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Size | Format | |
---|---|---|---|
fulltext.pdf | 2.52 MB | Adobe PDF | View/Open |
Items in MacSphere are protected by copyright, with all rights reserved, unless otherwise indicated.