Morphology development during polymer blending

We present results on the morphologies of incompatible polymer blends analysed by several techniques (SEM and particle counter after separation). These result show, in the concentration zone just below the inversion phase, the simultaneous presence in the blend of nodular and fibrillar structures. A global interpretation of the phenomena allows us to propose a new relation using the Tomokita notion of fiber stability to predict the phase inversion region. (orig.)