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Crystallization behavior and mechanical properties of polypropylene random copolymer/poly(ethylene‐octene) blends
Author(s) -
Tang Weihua,
Tang Jian,
Yuan Huilin,
Jin Riguang
Publication year - 2011
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.34162
Subject(s) - materials science , polypropylene , crystallization , nucleation , copolymer , octene , izod impact strength test , polymer blend , toughness , composite material , morphology (biology) , compatibilization , plastics extrusion , polymer , polymer chemistry , chemical engineering , chemistry , genetics , organic chemistry , biology , engineering , ultimate tensile strength
Abstract New polymer blends of polypropylene random copolymer (PP‐R) and poly(ethylene‐octene) (POE) were prepared by melt‐blending process using a corotating twin‐screw extruder. The POE content was varied up to 35%. The toughening efficiency of POE for PP‐R was evaluated by the mechanical properties of the resulted PP‐R/POE blends. The crystallization behavior and morphology of the blends were also studied. Results show that POE acts as nucleation agent to induce the crystallization of PP‐R matrix at higher crystallization temperature. Super‐toughened PP‐R/POE blends (Izod impact strength more than 500 J/m) can be readily achieved with only 10 wt % of POE. The high toughness of PP‐R/POE is attributed to cavitation and shear yielding of matrix PP‐R, as revealed by the morphology studies. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011