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a) b - École Polytechnique de Montréal

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structures are formed due to the coalescence of droplets. At low interfacial tension of B/C the<br />

interfacial area between these phases increases and small droplets of phase (C) are dispersed in<br />

phase (B). For the case of a high interfacial tension of B/C, the droplets coalesce with each other<br />

and large droplets or a continuous structure of that phase is observed. Finally the effect of shear<br />

rate is shown and at low shear rate, the shape of the phases are more regular and the phase sizes<br />

are larger due to the higher capillary number. At high shear rate, the structures become more<br />

elongated and the number of composite droplets and continuous islands increase due to the<br />

smaller size of the phases.<br />

Interfacial Tension<br />

Composition<br />

Equation 7-1. Depen<strong>de</strong>nce of the morphology of a ternary blend <strong>de</strong>monstrating complete wetting<br />

on the interfacial tension of B and C and as a function of the composition of Phases B and C at<br />

low shear rate. Note that in the schematics, yellow represents phase (A) which is the matrix, blue<br />

represents phase (B) and green represents phase (C).<br />

207

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