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Viscosity effect in polyolefin ternary blends and composites
Author(s) -
Kim Byung Kyu,
Kim Myun Soo,
Kim Kook Joong
Publication year - 1993
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.1993.070480715
Subject(s) - materials science , polyolefin , composite material , natural rubber , crystallinity , ultimate tensile strength , polypropylene , viscosity , ternary operation , polyethylene , dispersion (optics) , izod impact strength test , polymer blend , polymer , copolymer , physics , layer (electronics) , computer science , optics , programming language
Ternary blends of PP (80) /rubber (EPM, EPDM) (10) / PE (10) and PP (80) / rubber (10) / CaCO 3 (10) composites were prepared in a twin‐screw extruder. With polyethylene (PE) viscosity comparable to, or higher than that of rubber, the dispersed phase formed a reticulate structure with reduced size. On the contrary, when the viscosity of PE was significantly lower than that of rubber, the dispersed phase formed almost homogeneous morphology. With reticulate morphology, PE crystallinity content, hardness, modulus, and elongation at break of the ternary blend increased. In polypropylene (PP) / rubber / CaCO 3 composites, better dispersion of CaCO 3 in the PP matrix was obtained when the viscosity of rubber was significantly higher than that of matrix. With better dispersion, hardness and tensile properties were improved, but the impact strength more or less decreased. © 1993 John Wiley & Sons, Inc.