Preparation and properties of cyclic olefin copolymers multiwalled carbon nanotube nanocomposites |
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| Authors: | Zhen‐hua Chen Changchun Zeng Chuck Zhang Ben Wang Kun Cao Zhen Yao |
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| Affiliation: | 1. High Performance Materials Institute, Florida State University, Tallahassee, Florida;2. Department of Industrial and Manufacturing Engineering, FAMU‐FSU College of Engineering, Tallahassee, Florida;3. State Key Laboratory of Chemical Engineering, Zhejiang University, Hangzhou 310027, China;4. Institute of Polymerization and Polymer Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Nanocomposites of cyclic olefin copolymer (COC) and two types of multiwalled carbon nanotubes (MWCNTs) with different aspect ratios were prepared. The morphology, thermal behavior, and electrical conductivity of the nanocomposites were investigated by scanning electron microscopy, differential scanning calorimetry, thermal gravimetric analysis, and the DC conductivity measurement. It was found that the developed nanocomposite preparation method resulted in good nanotubes dispersion in the polymer matrix for both types of MWCNTs. No appreciable differences in glass transition temperatures were observed between the pure COC and nanocomposites. On the other hand, CNTs significantly improved the thermo‐oxidative stability of the COC. The nanocomposites showed significant delay in onset of degradation and the degradation temperature was ～ 40°C higher than that of the pure COC. The nanocomposites also showed substantially higher DC conductivity, which increased with the nanotube concentration and aspect ratio. An increase of DC electrical conductivity over 109 times can be achieved by the addition of 2 wt % CNTs. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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| Keywords: | cyclic olefin copolymer carbon nanotubes, nanocomposites thermal properties electrical conductivity |
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