Influence of thermal and UV treatment on the polypropylene/graphite composite |
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| Institution: | 1. College of Chemistry and Chemical Engineering, Chongqing University of Technology, 69 Hongguang Rd, Lijiatuo, Banan District, Chongqing 400054, PR China;2. Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, PR China;3. School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, PR China;4. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;5. Jozef Stefan Institute, Jamova 39, Ljubliana SI-1000, Slovenia, EU;6. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia;7. CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia |
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| Abstract: | Electrically conductive polypropylene/graphite (PP/graphite) composites were prepared via blending granulated PP with maleic anhydride grafted PP and natural graphite. Electrical conductivity of prepared samples containing either 65, 70, or 75 wt% of graphite was measured and the most conductive sample containing 75 wt% of graphite was exposed to UV irradiation for 1 and 24 h or thermally treated at 170 °C for 1 h. The influence of thermal and UV exposure on the structural and electrical changes in such treated samples was studied. Local current measurements on the surface were made using scanning spreading resistance microscopy and morphology of the surface was studied by atomic force microscopy. X-ray diffraction analysis, infrared and Raman spectroscopy were also used for the structural characterization. Properties of treated and untreated samples are compared and differences are discussed. |
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| Keywords: | Polymer Composite Graphite Polypropylene Conductivity Scanning spreading resistance microscopy |
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