Abstract
Phase formation and evolution of high‐impact polystyrene/poly(cis‐butadiene) rubber (HIPS/PcBR) blends during melting and mixing processes were investigated by scanning electron micrographs analysis. The diameter, d p , was used to describe the evolution of the phase morphology of HIPS/PcBR blends during mixing. Scale functions, S N (r) and S M (r), were defined to confirm the self‐similarity of the phase morphology. The plots of S N (r)/S N (r) m [the maximum of S N (r)] vs. r/r m (the maximum of r) and S M (r)/S M (r) m [the maximum of S M (r)] vs. r/r m showed the phase morphology had self‐similarity. Furthermore, the fractal dimension, D, of different HIPS/PcBR blends was calculated by two different methods (fractal measure relations and box‐counting methods). The results showed that the fractal dimension was an effective parameter for study of the phase morphology of polymer blends.
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