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- W2327448248 abstract "N -vinylcarbazole (NVC) was polymerized in bulk through the interaction of multi-walled carbon nanotube (MWCNT) without any extraneous catalyst. A PNVC-MWCNT composite was isolated by MeOH precipitation of a polymerization system containing NVC and MWCNT at melting temperature of the monomer. The inclusion of PNVC in the composite was endorsed by the FTIR study. TG analysis revealed the thermal stability trend as MWCNT > PNVC-MWCNT composite > PNVC. DTA showed two exothermic peaks at 427 °C and 607 °C in the PNVC-MWCNT composite. Transmission electron microscopic analyses of MWCNT revealed presence of tubular MWCNT particles with diameters in nm range while the corresponding analysis for the composite showed the formation of spherical dark polymer particles encapsulating cylindrical MWCNT moieties with some ends of uncoated MWCNT tubes (light shades) protruding out of the dark spherical particles. Scanning electron microscopic analysis revealed presence of tubular CNT particles entangled with the composite particles of irregular shapes and sizes. XRD analysis revealed no additional crystalline peaks for PNVC in the composite. In contrast to PNVC homopolymer (10 –12 –10 –16 S/cm), the dc conductivity values of the composite varied form 1.3 to 33 S/cm depending upon the weight ratio of MWCNT and PNVC in the composite. Current–voltage characteristics of the composite showed a linear variation and conductivity–temperature studies revealed an increase in conductivity by 35% in the temperature range 150–220 °C." @default.
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- W2327448248 date "2008-04-01" @default.
- W2327448248 modified "2023-09-25" @default.
- W2327448248 title "Preparation and Properties of Poly(N-vinylcarbazole) and MWCNT Nanocomposites" @default.
- W2327448248 doi "https://doi.org/10.1166/jnn.2008.18239" @default.
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