Abstract
The use of a diffusing-wave spectroscopy (DWS) technique for the particle size analysis of a series of suspensions of polymer latexes with diameters ranging between 90 nm and 1300 nm and volume fractions from 0.02 to 0.18 has been investigated. Particle sizes from DWS were in reasonable agreement with those from transmission electron microscopy and disc centrifuge photosedimentometry. Photon correlation spectroscopy was applicable only to the latexes with particle sizes less than 500 nm. For polymer latexes with volume fractions (Vf) up to 0.09, the decay rate of the autocorrelation function from DWS was related to the particle size over the range of particle sizes examined. At the highest volume fraction (Vf = 0.18), it was possible to distinguish between particles with diameters of 740 and 1,300 nm from their autocorrelation functions, but not between particles with diameters of 90 and 430 nm.
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Acknowledgements
The development of the DWS equipment used in this work was funded by a CASE studentship from the EPSRC sponsored by Glaxo-SmithKline.
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Navabpour, P., Rega, C., Lloyd, C.J. et al. Influence of concentration on the particle size analysis of polymer latexes using diffusing-wave spectroscopy. Colloid Polym Sci 283, 1025–1032 (2005). https://doi.org/10.1007/s00396-004-1265-2
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DOI: https://doi.org/10.1007/s00396-004-1265-2