Abstract: The process of spinodal decomposition in polymer blends has been investigated by elastic light scattering, image analysis, computer simulation, scaling and fractal concepts. The results show that there exists the scaling behaviour for structure function. The morphology of phase separation in polymer blends is a fractal structure. The fractal dimension nearly does not change with time. Fractal aggregation takes place in the process of phase separation, The fractal structure of the morphology of phase separation results in dynamical scaling of structure function.

Key words: Scaling, Fractals, Light scattering, Polymer blends, Phase separation