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Monodispersed microspheres(MS) of poly (methyl methacrylate) were prepared in cyclohexane with the dispersion polymerization method. The copolymer of dodecyl methacrylate and glycidyl methacrylate was used as a dispersant. The dispersion of purified MS in cyclohexane was very stable. It is considered that esterified glycidyl group of the dispersant is chemically bound to MS and its poly- (dodecyl methacrylate) moiety forms an adsorbed layer on MS. Potential energy between two MS particles was calculated by the Ottewill-Walker and Vold equations in order to estimate the effect of the adsorbed layer on the stability of the dispersion. V<SUB>max</SUB> =10 k T was obtained froin the potential energy curve. The result was consi stent with the observation of the dispersion stability.<BR>The adsorption of a disperse dy e, C. I. Disperse Yellow 7, and water-soluble dyes, C. I. Acid Blue 138 and C. I. Basic Violet 3, on the polymer MS was studied. The adsorption isotherm of the disperse dye. was divided into the reversible and irreversible adsorption isotherms. The isotherm was linear and the adsorption rate was fast in the former. On the other hand, the latter showed the Langmuir type and a slow rate. Water-soluble dyes were solubilized into water-solubilizing AOT [sodium 1, 2-bis(2-ethylhexyloxycarbonyl)ethanesulfonate] solutions in cyclohexane. The adsorption of the secondarily solubilized dyes was studied. Adsorptio n isotherms of 'both dyes were the Langmuirian. The amount of the adsorption decreased markedly with an increase of the amount of water salubilized in the AOT solution.
- 公益社団法人 日本化学会の論文
公益社団法人 日本化学会 | 論文
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