Adsorption of styrene on micron-sized, monodisperse, cross-linked polymer particles in a snowman-shaped state by utilizing the dynamic swelling method |
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| Authors: | M Okubo H Minami Z Wang E Ise |
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| Institution: | (1) Department of Chemical Science and Engineering, Faculty of Engineering Kobe University, Kobe 657-8501, Japan e-mail: okubo@cx.kobe-u.ac.jp Tel.: +81-78-8036161 Fax: +81-78-8036205, JP;(2) Graduate School of Science and Technology, Kobe University Kobe 657-8501, Japan, JP |
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| Abstract: | Polystyrene/styrene–divinylbenzene copolymer composite particles with different cross-linking densities were produced by
seeded copolymerization for (styrene/divinylbenzene)-swollen polystyrene particles prepared by utilizing the dynamic swelling
method (DSM) which was proposed by the authors in 1991. Using the cross-linked, composite particles as seeds, styrene-adsorbed
(swollen) composite particles having snowman shapes were prepared by the DSM. With a decrease in the cross-linking density
in the composite particles, the volume of the composite particle which was embedded in a spherical styrene phase in the snowman-shaped,
styrene-adsorbed particle increased and the contact angle of the styrene phase on the composite particle decreased. In the
DSM process, the absorption stage of styrene in the composite particles and the adsorption stage thereon were clearly observed.
This suggests that the cross-linking density of the composite particles greatly affects the morphology of the snowman-shaped
particles.
Received: 13 December 2000 Accepted: 14 March 2001 |
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| Keywords: | Key words Dynamic swelling method Snowman shape Particle Morphology Contact angle |
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