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Preparation and characterization of polyamide composites with modified graphite powders

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Abstract

Although Graphite powders (GPs) are used widely as fillers to improve the electrical, thermal and mechanical properties of polymers, their poor affinity with polymers has limited their industrial applications in many fields. In the present work, GPs were modified by a proposed chemical method to improve their affinity with polyamide 6 (PA6). The GPs was first oxidized with hydrogen peroxide (GPs-OH) and then modified with hexmethylene diisocryanate (GPs-NH2). The X-ray photoelectron spectroscopy (XPS), elemental analysis, thermogravimetric analysis (TGA), X-ray diffraction (XRD) and electrical properties results proved the successful modification of GPs by the proposed method. The composites of GPs and PA6 (GPs/PA), GPs-OH and PA6 (GPs-OH/PA) and GPs-NH2 and PA6 (GPs-NH2/PA) were prepared via the twin-screw extruding and injection molding processes. The scanning electron microscopy (SEM) images and the optical microscopy images of composites showed good compatibility between modified GPs and PA6. The test results of tensile strength and bending strength suggested that the modified GPs can enhance the mechanical properties of PA6, which will increase its application in various fields.

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Authors and Affiliations

  1. Department of Machine Intelligence and Systems Engineering, Faculty of Systems Engineering, Akita Prefectural University, Akita, 015-0055, Japan

    Xueli Wu, Jianhui Qiu & Eiichi Sakai

  2. Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu, 730000, China

    Peng Liu

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  1. Xueli Wu
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  2. Jianhui Qiu
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  3. Peng Liu
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  4. Eiichi Sakai
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Correspondence to Jianhui Qiu.

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Wu, X., Qiu, J., Liu, P. et al. Preparation and characterization of polyamide composites with modified graphite powders. J Polym Res 20, 284 (2013). https://doi.org/10.1007/s10965-013-0284-4

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  • DOI: https://doi.org/10.1007/s10965-013-0284-4

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