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Crystallization behavior and mechanical properties of polypropylene random copolymer/poly(ethylene-octene) blends

Authors

  • Weihua Tang,

    Corresponding author
    1. Key Laboratory of Soft Chemistry and Function Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
    2. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
    • Key Laboratory of Soft Chemistry and Function Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
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  • Jian Tang,

    1. Key Laboratory of Soft Chemistry and Function Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
    2. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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  • Huilin Yuan,

    1. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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  • Riguang Jin

    1. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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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

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