CSIR Central

Structural details, electrical properties, and electromagnetic interference shielding response of processable copolymers of aniline

IR@NPL: CSIR-National Physical Laboratory, New Delhi


Field	Value

Title	Structural details, electrical properties, and electromagnetic interference shielding response of processable copolymers of aniline

Creator	Saini, Parveen Choudhary, Veena

Subject	Materials Science

Description	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 similar to 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.

Publisher	Springer Verlag

Date	2012

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://npl.csircentral.net/3043/1/Structural%20details%2C%20electrical%20properties.pdf Saini, Parveen and Choudhary, Veena (2012) Structural details, electrical properties, and electromagnetic interference shielding response of processable copolymers of aniline. Journal of Materials Science, 48. pp. 797-804. ISSN 0022-2461

Relation	http://npl.csircentral.net/3043/