Abstract
Blends of sPS/iPP of various compositions from 55/45 to 82/18 were prepared with a novel catalyst by polymerization. Crystal forms, crystallinity and melting behavior of sPS/iPP blends have been studied by FTIR spectroscopy, XRD and DSC. The results obtained show that the polymerization blending and the processing at 290 °C are favorable for formation of α-form crystals in neat sPS and in sPS/iPP blends. Melting points (T m ) and crystallinity of sPS and iPP in blends are reduced. The reflection peaks of sPS in the blends are diffuse and not easily depicted in X-ray patterns. The crystallization rate of iPP is slightly affected by blending, while the crystallization rate of sPS is strongly reduced.
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