Preparation of polystyrene particles containing poly(ethylene glycol) groups and their surface charge characterization in dielectric medium

作者：Kim SH^*; Kim BJ; Kwon DI; Park KH

来源：Polymer-Korea, 2004, 28(6): 524-530.

• emulsifier-free emulsion polymerization
• poly(ethylene glycol) methacrylate
• poly(ethylene glycol) dimethacrylate
• polystyrene powders
• zeta potential

Polystyrene particles (PS) with poly(ethylene glycol) units on surface were formed by an emulsifier-free emulsion polymerization using styrene, poly(ethylene glycol) methacrylate (PEG-MMA) or poly(ethylene glycol) dimethacrylate (PEG-diMMA) at pH 7, and followed by freeze-drying to give the corresponding powders. The structures of PS particles were confirmed by FT-IR spectroscopy, and the particle size and distribution the PS particle were observed by scanning electron microscopy and particle analyzer. Monodisperse polymer particles were obtained at a concentration of PEG-MMA 2similar to5 mol% or PEG-diMMA 1 mol% relative to styrene. The highest zeta potential of polymer surface was measured to be 183 mV at a polymer of PEG-MMA 5 mol%, which was measured in dielectric medium by means of ELS-8000 dynamic light scattering.

• 出版日期2004-11