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Morphology and mechanical properties of polypropylene/maleated styrene–butadiene–styrene triblock copolymer blends
Author(s) -
Wilhelm Helena Maria,
Felisberti Maria Isabel
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10971
Subject(s) - copolymer , materials science , elastomer , maleic anhydride , polypropylene , styrene , morphology (biology) , fourier transform infrared spectroscopy , composite material , styrene butadiene , thermoplastic elastomer , polymer blend , tacticity , compatibilization , polymer chemistry , phase (matter) , polymer , chemical engineering , polymerization , chemistry , organic chemistry , biology , engineering , genetics
The morphology and mechanical properties of blends of isotactic polypropylene (i‐PP) and a maleated butadiene–styrene–butadiene triblock copolymer with maleic anhydride (SBS–MAH), i‐PP/SBS–MAH, were investigated and compared with those of corresponding blends of i‐PP and a styrene–butadiene–styrene triblock copolymer (SBS), i‐PP/SBS. The blends were prepared in a mixer at 190°C with 5–25 wt % elastomer compositions. The blends exhibited a two‐phase morphology with a disperse elastomer phase in the continuous i‐PP matrix. The size and shape of the elastomer particles and the mechanical properties of the blends depended on the nature and concentration of the elastomer. The i‐PP/SBS–MAH blends showed an impact strength superior to that of the corresponding i‐PP/SBS blends. These results were attributed to the formation of the graft copolymer during the melt blending, which was verified by Fourier transform infrared. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 359–365, 2002