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- Title
Structural details, electrical properties, and electromagnetic interference shielding response of processable copolymers of aniline.
- Authors
Saini, Parveen; Choudhary, Veena
- Abstract
Processable copolymers of aniline with 2-alkylanilines were prepared by in situ chemical oxidative polymerization route. Formation of copolymers was confirmed by X-ray diffractometer (XRD), UV-Vis, and solubility measurements. XRD revealed that copolymerization leads to increase in inter-chain spacing and reduction of doping levels. UV-vis results showed that incorporation of substituted anilines in copolymeric backbone leads to decrease in conjugation, the extent of which is directly related to size of alkyl substituent. The electrical conductivities of these copolymers were slightly less than pure polyaniline, but noticeable improvement in the solution processability was observed. In addition, these copolymers also provided shielding against electromagnetic interference (EMI) with ~99 % attenuation of incident energy. Among various copolymers, 95:5 copolymer of aniline with 2-isopropyl aniline (CP95Ip) gave best performance in terms of electrical conductivity (12.8 S/cm), solubility (4.9 g/L in N-methyl pyrrolidone), and EMI shielding effectiveness (−23.2 dB) values.
- Subjects
COPOLYMERIZATION; ANILINE; POLYMERIZATION; COPOLYMERIZATION kinetics; ELECTRICAL conductivity measurement; ELECTROMAGNETIC interference measurement; MOLECULAR structure
- Publication
Journal of Materials Science, 2013, Vol 48, Issue 2, p797
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-012-6797-0