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Synthesis of amphiphilic magnetic microspheres by dispersion copolymerization of styrene and poly(ethylene oxide) macromonomer

✍ Scribed by Xue-Yong Liu; Xiao-Bin Ding; Zhao-Hui Zheng; Yu-Xing Peng; Albert S C Chan; C W Yip; Xin-Ping Long

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
134 KB
Volume
52
Category
Article
ISSN
0959-8103

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✦ Synopsis

Abstract

Amphiphilic magnetic microspheres ranging in diameter from 5 to 100 µm were prepared by dispersion copolymerization of styrene and poly(ethylene oxide) vinylbenzyl (PEO‐VB) macromonomer (MPEO) in the presence of Fe~3~O~4~ magnetic fluid. The effects of various polymerization parameters on the average particle size were systematically investigated. The average particle size was found to increase with increasing styrene concentration and initiator concentration. It also increased with decreasing stabilizer concentration and molecular weight of MPEO. The content of the hydroxyl groups localized in the microspheres ranged from 0.01 to 0.2 mmol g^−1^.

© 2003 Society of Chemical Industry

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