Study of dispersity of styrene emulsions using the metod of small-angle X-ray scattering (SAXS) (in English)
The small-angle X-ray scattering (SAXS) method was used in studies on dispersity of emulsions of potassium oleate micelles and of styrene emulsions obtained in the presence of this emulsifier. A lamellar structure of oleate micelles was observed. The solubilization of styrene in the system of emulsifier micelles was determined by refractometry. 0.6 ml styrene was dissolved in 100 ml of micellar solution of emulsifier. The micellar structure of the system remained almost unchanged. The structure and dispersity of styrene emulsions and the course of phase separation and ordering at the interface in the function of time elapsed from preparation of emulsion by intensive mixing was investigated. Dimensions and surface area of styrene macro- and microdroplets in the system were also determined. In a microemulsion, styrene particles with a diameter of about 10 nm prevailed and the ratio of the surface area of microdroplets to that of emulsifier micelles was about 1:20. The conditions of emulsion preparation had a large influence of the dispersity of emulsions obtained.
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