CCXLIII.—Aniline-black and allied compounds. Part I

Green, Arthur George; Woodhead, Arthur E.

doi:10.1039/ct9109702388

Cited by 311 publications

(94 citation statements)

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“…5,6 Since 1910, many oxidation states of this polymer have been studied. 7,8 The form that exhibits the strongest conducting properties is Emeraldine, especially if doped with a protic acid. The chemically synthesized Emeraldine form has very low solubility in most of the organic solvents.…”

Section: Introductionmentioning

confidence: 99%

New conducting thermoplastic elastomers. I. Synthesis and chemical characterization

Carone

D’Ilario

Martinelli

2001

J of Applied Polymer Sci

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ABSTRACT:In the last 20 years, much interest has been focused on conducting polymers to find new materials to transfer from research to industry. However, in many cases, as for elastomers for which intrinsically conducting materials are unavailable, it is necessary to use conducting particles that are physically mixed with the polymeric matrix to give loaded rubbers. In this work we report the synthesis and the chemical characterization of an intrinsically conducting material with good mechanical and electrical conduction properties. To achieve such a global goal, we covalently linked, by an amidation reaction, the terminal NH 2 of Emeraldine (EB) and sulfonated Emeraldine (SPAN) to a free carboxylic group belonging to the repetitive unit of a functionalized segmented polyurethane. The reaction was carried out by activating such a carboxylic group with N,NЈ-dicyclohexylcarbodiimide and N-hydroxysuccinimide. The reaction yields and the chemical properties of the polymers were studied by proton and carbon-13 nuclear magnetic resonance, ultraviolet, and Fourier transform infrared spectroscopy. The average numbers of EB or SPAN aromatic rings per polyether urethane acid (PEUA) repetitive unit, which cannot be assumed to be amidation degree because at this moment the molecular weights of the inserted EB and SPAN chains are unavailable, were 6 in case of the polymer obtained from the pristine Emeraldine and 1 for that obtained from the sulfonated Emeraldine. This result could be because SPAN was used in the acidic form, which depresses the nucleophilicity of the NH 2 group because of the presence of the sulfonic protons.

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Section: Introductionmentioning

confidence: 99%

New conducting thermoplastic elastomers. I. Synthesis and chemical characterization

Carone

D’Ilario

Martinelli

2001

J of Applied Polymer Sci

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“…5 PANI and its derivatives can be obtained by chemical or electrochemical methods. 6 Although they are easily synthesized in the bulk, their use is restricted because of their nonprocessability by normal melt or solution techniques. Applications such as the control of electromagnetic interference (EMI) 7 and the dissipation of electrostatic charge (ESD) 8 require a thin conducting film or coating on a flexible surface or substrate.…”

Section: Introductionmentioning

confidence: 99%

Thermal and flame‐retardant properties of polyester fabric grafted with polyanilines

Salgaonkar

Jayaram

2004

J of Applied Polymer Sci

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ABSTRACT:The chemical grafting of polyaniline, poly(oanisidine), and poly(o-toluidine) on polyester fabric was carried out with ammonium peroxodisulfate in an acidic medium. The formation of the grafted fabric substrate was confirmed with reflectance spectroscopy, Fourier transform infrared spectroscopy, weight-loss studies, and conductivity measurements. The grafting percentage and efficiency percentage were determined for the different grafted substrates. The thermal and flame-retardant properties of these grafted substrates were elucidated. Thermogravimetric analysis thermograms and derivative thermogravimetry curves showed that the grafted substrates had a higher thermal stability and char-residue percentage at 700°C. The grafted substrates showed a higher activation energy of thermal decomposition than the nongrafted substrates. The grafted substrates showed good flame retardancy, which was evident from the increase in the limited oxygen index in comparison with that of the nongrafted substrate.

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“…Polyaniline, discovered in 1982 by Letheby 10 , is one of the most studied conducting polymers and has been used in many applications due to their environmental stability, low cost of fabrication, and unusual electrical and optical properties [11][12][13][14][15] . In addition, polyaniline exhibits electrochromic effects, from pale yellow to green to blue-velvet [16][17][18] . However, the main disadvantages of polyaniline are its insolubility in common organic solvents and its infusibility 19 .…”

Section: Introductionmentioning

confidence: 99%