Effects of stretching on mechanical properties of aligned multi-walled carbon nanotube/epoxy composites |
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| Affiliation: | 1. Department of Space Flight Systems, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa 252-5210, Japan;2. Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan;3. Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan;4. Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan;5. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;6. Department of Mechanical Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan;1. Corporate Strategic Research, ExxonMobil Research and Engineering, Annandale, NJ, 08801, USA;2. Analytical Sciences Laboratory, ExxonMobil Research and Engineering, Annandale, NJ, 08801, USA;1. Nanomaterials Research Center, School of Mechanical and Power Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China;2. School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, PR China;1. Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA;2. Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA;3. Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy NY 12180, USA;1. Academy of Scientific & Innovative Research, CSIR – Central Mechanical Engineering Research Institute, Durgapur 713209, India;2. Mechanics & Stress Analysis Department, CSIR – Central Mechanical Engineering Research Institute, Duragapur 713209, India |
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| Abstract: | Composites based on epoxy resin and differently aligned multi-walled carbon nanotube (MWCNT) sheets have been developed using hot-melt prepreg processing. Aligned MWCNT sheets were produced from MWCNT arrays using the drawing and winding technique. Wavy MWCNTs in the sheets have limited reinforcement efficiency in the composites. Therefore, mechanical stretching of the MWCNT sheets and their prepregs was conducted for this study. Mechanical stretching of the MWCNT sheets and hot stretching of the MWCNT/epoxy prepregs markedly improved the mechanical properties of the composites. The improved mechanical properties of stretched composites derived from the increased MWCNT volume fraction and the reduced MWCNT waviness caused by stretching. With a 3% stretch ratio, the MWCNT/epoxy composites achieved their best mechanical properties in this study. Although hot stretching of the prepregs increased the tensile strength and modulus of the composites considerably, its efficiency was lower than that of stretching the MWCNT sheets. |
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| Keywords: | A. Nano-structures A. Polymer–matrix composites (PMCs) B. Mechanical properties E. Prepreg |
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