Preparation of monodisperse ellipsoidal polystyrene particles |
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| Authors: | C. C. Ho A. Keller J. A. Odell R. H. Ottewill |
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| Affiliation: | (1) Present address: School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS Bristol, UK;(2) H.H. wills Physics Laboratory, University of Bristol, UK;(3) Present address: Department of Chemistry, University of Malaya, 59100 Kuala Lumpur, Malaysia |
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| Abstract: | A method is described for the preparation of monodisperse ellipsoidal particles of polystyrene in the colloidal size range. Monodisperse polystyrene particles were dispersed in a solution of polyvinyl alcohol. This dispersion was then allowed to form, by evaporation, a thin film of polyvinyl alcohol containing spherical polystyrene particles. Strips of this film were clamped into a metal frame, heated rapidly in an oil bath to 200°C and stretched to a predetermined extent in order to convert the spherical particles into ellipsoids; the film was then cooled. A wide range of axial ratios for a variety of initial particle sizes was obtained by this method. |
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| Keywords: | Polystyrene polyvinylalcohol latices ellipsoidal particles |
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