Microemulsion copolymerization of vinyl acetate and butyl acrylate using a mixture of anionic and non-ionic surfactants
作者： Víctor M. Ovando-Medina , René D. Peralta , Eduardo Mendizábal , Hugo Martínez-Gutiérrez , Miguel A. Corona-Rivera
DOI: 10.1007/S00289-010-0314-X
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摘要: Monomer mixtures of vinyl acetate (VAc)/butyl acrylate (BuA) were polymerized in batch reactions at 60 °C with potassium persulfate as the initiator microemulsions consisting VAc:BuA (85:15 wt/wt)/water/sodium dodecyl sulfate (SDS)/polyoxyethylene (23) ether (3:1 wt/wt). The effect concentration monomer mixture on kinetics was studied. It found that, total monomers ([M]0) increases, polymerization rate increases also, and that maximum is proportional to [M] 0 1.26 . Particle size concentration. In all cases, final average particle diameter less than 50 nm. number density independent A mathematical model takes into account partition between different phases during using a minimum adjustable parameters applied simulate experimental data. correlation for radical desorption coefficient, which function chain transfer probability desorption, used model. Radical capture by micelles particles assumed occur diffusion. both micellar homogeneous nucleation. Good agreement results observed.
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