Carboxylated multiwall carbon nanotube-reinforced thermotropic liquid crystalline polymer nanocomposites |
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Authors: | Sang Ki Park Seong Hun Kim Jin Taek Hwang |
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Affiliation: | 1. Department of Fiber and Polymer Engineering, Hanyang University, Seoul 133-791, Korea;2. E-Polymer, 110-15, Yanggam-Myon, Hwasung-Si, Kyunggi-Do 445-931, Korea |
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Abstract: | Thermotropic liquid crystalline polymer (TLCP) nanocomposites reinforced with carboxylated multiwall carbon nanotube (c-MWCNT) were prepared through melt compounding in a twin screw extruder. The thermal stability of TLCP/c-MWCNT nanocomposites increased with even a small amount of c-MWCNT added. The rheological properties of the TLCP/c-MWCNT nanocomposites were depended on the c-MWCNT contents. The contents of c-MWCNT have a slight effect on the complex viscosity of TLCP/c-MWCNT nanocomposites due to the high-shear thinning of TLCP. The storage modulus of TLCP/c-MWCNT nanocomposites was increased with increasing c-MWCNT content. This result can be deduced that the nanotube–nanotube interactions were more dominant, and some interconnected or network-like structures were formed in the TLCP/c-MWCNT nanocomposites. Incorporation of very small amount of c-MWCNT improved the mechanical properties of TLCP/c-MWCNT nanocomposites, and this was attributed to the reinforcement effect of c-MWCNT with high aspect ratio and their uniform dispersion through acid treatment in the TLCP matrix. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 |
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Keywords: | thermotropic liquid crystalline polymer carbon nanotube nanocomposites reinforcement |
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