The mechanical and electrical properties of carbon nanotube‐grafted polyimide nanocomposites |
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| Authors: | Jun Lim Dong Geun Shin Hyeonuk Yeo Munju Goh Bon‐Cheol Ku Cheol‐Min Yang Dong Su Lee Jun‐Yeon Hwang Byoungnam Park Nam‐Ho You |
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| Institution: | 1. Carbon Convergence Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology (KIST), , Wanju‐gun, Jeollabuk‐do, 565–905 Korea;2. Department of Materials Science and Engineering, Hongik University 72‐1, , Sangsu‐dong, Mapo‐gu, 121–791 Korea |
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| Abstract: | Polyimide (PI)‐based nanocomposites containing aminophenyl functionalized multiwalled carbon nanotubes (AP‐MWCNTs) obtained through a diazonium salt reaction was successfully prepared by in situ polymerization. PI composites with different loadings of AP‐MWCNTs were fabricated by the thermal conversion of poly(amic acid) (PAA)/AP‐MWCNTs. The mechanical and electrical properties of the AP‐MWCNTs/PI composites were improved compared with those of pure PI due to the homogeneous dispersion of AP‐MWCNTs and the strong interfacial covalent bonds between AP‐MWNTs and the PI matrix. The conductivity of AP‐MWNTs/PI composites (5:95 w/w) was 9.32 × 10?1 S/cm which was about 1015 times higher than that of Pure PI. The tensile strength and tensile modules of the AP‐MWCNTs/PI composites with 0.5 wt % of AP‐MWCNTs were increased by about 77% (316.9 ± 10.5 MPa) and 25% (8.30 ± 1.10 GPa) compared to those of pure PI, respectively. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014 , 52, 960–966 |
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| Keywords: | carbon nanotube diazonium salt reaction multiwalled carbon nanotubes nanocomposite polyimide |
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