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Phase structure and morphology of wollastonite‐reinforced polypropylene composites modified with SEBS and SEBS‐ g ‐MA elastomers
Author(s) -
Švab Iztok,
Musil Vojko,
Jurkin Tanja,
Šmit Ivan
Publication year - 2007
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20899
Subject(s) - materials science , polypropylene , composite material , wollastonite , elastomer , copolymer , maleic anhydride , scanning electron microscope , differential scanning calorimetry , tacticity , polymer , polymerization , raw material , chemistry , physics , organic chemistry , thermodynamics
Supermolecular structure of isotactic polypropylene/wollastonite/styrenic rubber block copolymers composites were studied as a function of elastomeric poly‐ (styrene‐ b ‐ethylene‐ co ‐butylene‐ b ‐styrene) triblock copolymer (SEBS) and the SEBS grafted with maleic anhydride (SEBS‐ g ‐MA) content (from 0 to 20 vol%) by optical, scanning, and transmission electron microscopy, wide‐angle X‐ray diffraction and differential scanning calorimetry. Wollastonite particles disturbed the spherulitization of polypropylene matrix. Both elastomers affected the crystallization of polypropylene matrix mainly by solidification effect. Although SEBS‐ g ‐MA encapsulated wollastonite particles more expressive than SEBS forming thus core‐shell morphology in higher extent, scanning electron micrographs indicated more constrained wollastonite particles in fractured surfaces of composites with SEBS elastomer. Moreover, SEBS‐ g ‐MA disorientated wollastonite particles and affected reorientation of the polypropylene crystallites stronger than SEBS elastomer. POLYM. ENG. SCI., 47:2145–2154, 2007. © 2007 Society of Plastics Engineers