Mechanical and functional properties of composites based on graphite and carboxylated acrylonitrile butadiene rubber

Authors

  • Jian Yang,

    1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing, China 100029
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  • Li-Qun Zhang,

    1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing, China 100029
    2. Key Laboratory of the Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China 100029
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  • Jun-Hong Shi,

    1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing, China 100029
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  • Yan-Nan Quan,

    1. Key Laboratory of the Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China 100029
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  • Lei-Lei Wang,

    1. Key Laboratory of the Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China 100029
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  • Ming Tian

    Corresponding author
    1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing, China 100029
    2. Key Laboratory of the Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China 100029
    • Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing, China 100029
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Abstract

In this study, carboxylated acrylonitrile butadiene rubber (xNBR)/expanded graphite (EG) nanocomposites were prepared with a latex compounding technique by ultrasonic stirring. The dispersion of EG in the xNBR matrix was investigated with transmission electron microscopy, scanning electron microscopy, and X-ray diffraction analysis. EG could be exfoliated into lots of nanosheets dispersing in the xNBR matrix. More EG loading resulted in the presence of a few incompletely exfoliated agglomerates. The mechanical properties (hardness, tensile modulus, and tensile strength) of the xNBR/EG composites were determined. Dynamic mechanical thermal analysis was also performed, and it showed that the nanosheets of EG somewhat immobilized the motion of rubber macromolecular chains and led to the shifting and broadening of the tan δ peak toward higher temperatures. Many other functional properties of EG-filled xNBR composites were studied, and it was established that the composites had excellent electrical conductivity as well as gas-barrier and wear properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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