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Preparation of Polystyrene Particles by Dispersion Polymerization in an Ionic Liquid

✍ Scribed by Hideto Minami; Kazuhiro Yoshida; Masayoshi Okubo

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
247 KB
Volume
29
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Submicron‐sized monodisperse polystyrene (PS) particles were successfully prepared by dispersion polymerization of styrene in an ionic liquid, N,N‐diethyl‐N‐methyl‐N‐(2‐methoxyethyl)ammonium bis(trifluoromethanesulfonyl)imide ([DEME][TFSI]) at 70 °C with poly(vinyl pyrrolidone) (PVP) as a stabilizer. At the optimum PVP and styrene concentrations with regard to preparation of stable polymer particles, the number‐average diameter and coefficient of variation were 350 nm and 5.7%, respectively. The particle size increased with a decrease in the PVP concentration and an increase in the styrene concentration. Moreover, we succeeded in producing PS particles by thermal polymerization in the absence of a radical initiator at 130 °C in [DEME][TFSI] using a conventional reactor (not autoclave) utilizing the advantages of non‐volatility and thermal stability of the ionic liquid.

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