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Polymorphic Crystals and Melting Behavior of sPS/iPP Blends Prepared by Polymerization
Author(s) -
Xu Demin,
Ke Yucai,
Hu Youliang
Publication year - 2002
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20020101)203:1<80::aid-macp80>3.0.co;2-h
Subject(s) - crystallinity , materials science , polymerization , crystallization , melting point , polymer chemistry , chemical engineering , polymer , composite material , engineering
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 FT‐IR 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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