Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/95247
Title: The particle size of latexes from dispersion polymerization of styrene using poly(ethylene oxide) macromonomer as a polymerizable stabilizer
Authors: Liu, J.
Gan, L.M. 
Chew, C.H. 
Quek, C.H. 
Gong, H. 
Gan, L.H.
Keywords: Dispersion polymerization
Latexes
PEO macromonomer
Styrene
Issue Date: 30-Nov-1997
Source: Liu, J.,Gan, L.M.,Chew, C.H.,Quek, C.H.,Gong, H.,Gan, L.H. (1997-11-30). The particle size of latexes from dispersion polymerization of styrene using poly(ethylene oxide) macromonomer as a polymerizable stabilizer. Journal of Polymer Science, Part A: Polymer Chemistry 35 (16) : 3575-3583. ScholarBank@NUS Repository.
Abstract: The particle sizes and their size distributions of latexes from the dispersion polymerization of styrene using a small amount of ω-methoxy poly(ethylene oxide )n undecyl-α-methacrylate macromonomer (PEO-R-MA-40) as a polymerizable stabilizer in ethanol-water media have been studied. Monodisperse or/and nearly monodisperse latex particles from 0.1 to 1 μm in diameter were readily obtained. The diameter of latex particles follows the relationship Dvad ∞ θ0.33 [PEO-R-MA-40]-0.60 o [styrene]1.02 o [AIBN]-0.09 o, where θ is the fractional conversion of styrene. Except for the styrene concentration dependency, this relationship is in excellent agreement with the model developed by Paine11 and modified by Kawaguchi et al.13. When the surface composition of the grafted PEO macromonomer on the latex particles exceeded 16% as analyzed by X-ray photoelectron spectroscopy (XPS), the particles were nearly monodisperse. In terms of polymerization, this occurred around 18% conversion of styrene. Beyond this critical state of polymerization, the latex particles grew bigger with more PEO macromonomer-styrene copolymers situated on the particle surface. The effect of various factors on the particle size distribution is also discussed. © 1997 John Wiley & Sons, Inc.
Source Title: Journal of Polymer Science, Part A: Polymer Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/95247
ISSN: 0887624X
Appears in Collections:Staff Publications

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