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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.18 [2011] >
IJCT Vol.18(2) [March 2011] >
| Title: | Thermal and conducting behaviour of emeraldine base (EB) form of polyaniline (PANI) |
| Authors: | Chauhan, Narendra P S
Ameta, Rakshit
Ameta, Rohit
Ameta, Suresh C |
| Keywords: | Conducting polymer
Polyaniline-emeraldine base
Two-probe conductivity method
Differential scanning calorimetry |
| Issue Date: | Mar-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Emeraldine base (EB) form of polyaniline (PANI)
powder is prepared by chemical oxidative polymerization using different acidic
media (HCl or CF3COOH) at different temperatures (-15°C to + 5°C). The
chemical structure, thermal characterization and conducting behaviour are
studied by means of Fourier transform infra-red (FTIR) spectroscopy, differential
scanning calorimetery (DSC) and two-probe conductivity method. These
polyanilines are soluble in N-methyl-2-pyrrolidone,
dimethyl sulfoxide (DMSO) and dimethylpropylene urea (DMPU). The softening temperatures
of different EB range from 87.8-116.4°C, which
is believed to be an indication of cross-linking. Conductivity of emeraldine
base of PANI is around (0.8-1.5) × 10-6 S/cm and energy band gap is approximately
0.5 eV, and no detectable crystallinity is observed. Wide-angle XRD technique
indicates that PANI- EB base is amorphous in nature. |
| Page(s): | 118-122 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.18(2) [March 2011]
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