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Mechanical properties of wollastonite‐reinforced polypropylene composites modified with SEBS and SEBS‐ g ‐MA elastomers
Author(s) -
Švab Iztok,
Musil Vojko,
Šmit Ivan,
Makarovič Matjaž
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.20897
Subject(s) - materials science , wollastonite , composite material , polypropylene , copolymer , elastomer , maleic anhydride , thermoplastic elastomer , miscibility , flexural modulus , ultimate tensile strength , polymer , raw material , chemistry , organic chemistry
Mechanical properties of isotactic polypropylene/wollastonite/styrene rubber block copolymers (iPP/wollastonite/SRBC) composites were studied as a function of elastomeric poly(styrene‐ b ‐ethylene‐ co ‐butylene‐ b ‐styrene) triblock copolymer (SEBS) and SEBS grafted with maleic anhydride (SEBS‐ g ‐MA) content from 0 to 20 vol%. Microphase morphology was stronger influenced by SRBC elastomers than by different wollastonite types. Higher encapsulation ability of SEBS‐ g ‐MA than SEBS caused more expressive core‐shell morphology and consequently higher notched impact strength as well as yield parameters, but lower Young's modulus. Higher ductility of the composites with SEBS than with SEBS‐ g ‐MA has been primarily caused by better miscibility of the polypropylene chains with SEBS molecules. Surface properties of components and adhesion parameters also indicated that adhesion at SEBS‐ g ‐MA/wollastonite interface, which was stronger than the one at the SEBS/wollastonite interface, influenced higher encapsulation of wollastonite particles by SEBS‐ g ‐MA. POLYM. ENG. SCI., 47:1873–1880, 2007. © 2007 Society of Plastics Engineers