Preparation and characterization of injection-homo-polypropylene filled with nano-CaCO3

Authors

  • Wen-Yi Wang,

    1. Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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  • Guo-Quan Wang,

    1. Institute of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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  • Xiao-Fei Zeng,

    Corresponding author
    1. Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
    • Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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  • Jian-Feng Chen

    Corresponding author
    1. Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
    • Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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Abstract

Nano-CaCO3/homo-PP composites were prepared by melt-blending using twin-screw extruder. The results show that not only the impact property but also the bending modulus of the system have been evidently increased by adding nano-CaCO3. The nano-CaCO3 particles have been dispersed in the matrix in the nanometer scale which was investigated by means of transmission electron microscopy (TEM). The toughening mechanism of nano-CaCO3, investigated by means of dynamical mechanical thermal analysis (DMTA) and scanning electron microscopy (SEM), lies on that the nano-CaCO3 particles take an action of initiating and terminating crazing (silver streak), which can absorb more impact energy than the neat PP. At the same time, the nano-CaCO3 particles, as the nuclear, decrease the crystal size of PP, the results of which were investigated by means of polarized optical microscope (POM). © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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