Synthesis, characterization and electrical properties of poly(dibromoaniline-co-aniline)s

• Published in: Journal of materials science Vol. 38; no. 11; pp. 2455 - 2459
• Main Authors: DIAZ, F. R, DEL VALLE, M. A, TAGLE, L. H, TORRES, J. L
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.06.2003; Springer Nature B.V
• Subjects: Acetonitrile; Aniline; Applied sciences; Composition effects; Copolymerization; Copolymers; Electrical properties; Electrical resistivity; Exact sciences and technology; Materials science; Organic chemistry; Organic polymers; Oxidation; Physicochemistry of polymers; Polyanilines; Polymers with particular properties; Potassium dichromate; Preparation, kinetics, thermodynamics, mechanism and catalysts; Substitutes; Sulfuric acid; Substituent effect; Conducting polymers; Aniline copolymer; Electrical conductivity; Electrical properties; Property composition relationship; Bromine containing copolymer; Preparation; Soluble compound; Property structure relationship; Oxidative polymerization; Experimental study
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1023961319841

The chemical copolymerization of aniline and 2,5-dibromoaniline or 2,6-dibromoaniline by oxidation with K2Cr2O7 in H2SO4/acetonitrile media has been carried out. Copolymer composition can be effectively controlled varying the monomer feed ratio. When substituted aniline fraction is increased in the copolymer, the electrical conductivity (σ) decreases; this effect is more important when 2,6-dibromoaniline is used. Thus, the conductivity can be controlled in a broad range, from 1.2 to 10−6–10−11 S·cm−1 depending on the substituted aniline and the feed ratio. The relations between copolymer compositions and comonomer feed molar ratios shows that the aniline is slightly more reactive than dibromoanilines during the copolymerization process. All the copolymers were shown to be more processable than polyaniline.