Mechanical and dielectric properties of SEBS modified by graphite inclusion and composite interface |
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| Institution: | 1. National Institute of Research and Development for Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021 Bucharest, Romania;2. POLITEHNICA University of Bucharest, Faculty of Electrical Engineering, ELMAT Laboratory, 313 Splaiul Independentei, 060042, Romania;1. High Pressure Physics Lab., Department of Physics, University of Rajasthan, Jaipur 302004, India;2. Mineral Physics Division, CSIR-National Geophysical Research Institute, Hyderabad 500007, India;3. Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology (CSIR), Hyderabad 500007, India;1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China;2. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, PR China;3. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China;1. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, PR China;2. Center for Composite Materials and Structure, Harbin Institute of Technology, Harbin 150001, PR China;1. Centro/Departamento de Física da Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal;2. Escola Superior de Tecnologia, Instituto Politécnico do Cávado e do Ave, Campus do IPCA, 4750-810 Barcelos, Portugal;3. Centro/Departamento de Química da Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal;1. The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China;2. Research Center for Application of Graphene, Sichuan University-WuXi, Wuxi, 214000, China;3. State Key Laboratory of Biotherapy, Sichuan University, Chengdu, 610065, China |
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| Abstract: | Tough and flexible dielectrics were prepared using graphite (G), a natural and low-cost resource, as filler in polystyrene-b-(ethylene-co-butylene)-b-polystyrene (SEBS) and maleinized SEBS (SEBS-MA) matrices. The disintegration of graphite in submicron particles was accomplished by the shear forces during the melt processing step and it was highlighted by atomic force microscopy. Simultaneous increase of tensile strain, strength and Young's modulus was noticed for SEBS/G and SEBS-MA/G composites compared to unfilled matrices, this remarkable feature being previously reported only for some nanocomposites. Moreover, an exponential variation of the dielectric permittivity with the volume fraction of G was obtained. Higher reinforcing efficiency and better dielectric properties were observed in SEBS-MA/G composites, compared to the corresponding SEBS/G composites, due to the stronger polymer–filler interface and better dispersion of graphite. This study brings new insights into nanolevel properties of SEBS composites and it opens new perspectives on high performance composites by using graphite instead of expensive graphene and efficient melt mixing process. |
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| Keywords: | A Nanostructures A Polymers D Mechanical properties D Dielectric properties AFM |
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