Chemical synthesis of highly electrically conductive polypyrrole

“…The use of ferric chloride in methanol has been reported to produce a polymer with much less oxygen incorporation and high hydrogen : carbon ratios of 3.25 : 4 were reported. 20 It has been hypothesised that high ratios of hydrogen : carbon in conducting polymers correlate with low conductivities. 10 Despite the high hydrogen content of the polymer produced using ferric chloride in methanol its conductivity was higher than that of 10 which had a lower hydrogen content (Table 1).…”

Section: The Effect Of Acid On the Oxidative Polymerisation Of Polypymentioning

confidence: 99%

A study of the effects of acid on the polymerisation of pyrrole, on the oxidative polymerisation of pyrrole and on polypyrrole

Hawkins

Ratcliffe

2000

J. Mater. Chem.

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The polymer products arising from the hydrochloric acid treatment of aqueous pyrrole were shown to have spectroscopic data consistent with alternating pyrrole and pyrrolidine units with varying degrees of ring opening of the pyrrole units. The acid catalysed polymerisation of pyrrole offers a facile route to polymers with amine and carbonyl functional groups, which could be further derivatised. The products were polydisperse spheres; however the use of steric stabilisers induced monodisperse sphere formation and a concomitant ten fold decrease in size. Dilute nitric acid treatment of aqueous pyrrole gave polydisperse spheres (and ovoid shapes) in lower yield, plus a small proportion of curious particles which resembled pitted olives. The presence of acid in the reaction mixture of pyrrole and ferric ions was shown to have a relatively small effect on the conductivity of the resultant polypyrrole. The ability of polypyrrole to withstand harsh acidic conditions was assessed. Polypyrrole was shown to possess signi®cant conductivity even after treatment with boiling concentrated hydrochloric acid.

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“…1) and they were chemically polymerized by the method developed by Machida and coworkers. 10) In the chemical polymerization, anhydrous FeCl 3 turned out most effective in polymerizing our monomers than other oxidants. The reactions gave rise to relatively higher molecular weight polymers in good yields (Fig.…”

Section: Monomer Synthesis and Chemical Polymerizationmentioning

confidence: 99%

Chemical and Electrochemical Synthesis of Highly Conductive and Processable PolyProDOP-alkyl Derivatives

Cho¹,

Pyo²,

Zong³

2010

Journal of the Korean Electrochemical Society

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: New monomers, possessing various alkyl substituents on propylene dioxypyrrole, were synthesized. The monomers could be easily polymerized to produce highly conductive and soluble polymers. The corresponding polymers showed excellent solubility, retaining electrochemical and optical properties of their parent polymer [poly(propylene dioxypyrrole)]. The conductivities of chemically prepared polymers were quite high in a range of 20 and 60 Scm −1. Solubility of the polymer in a common organic solvent was as high as no polymer is deposited on an electrode. The redox potentials of the electrochemically prepared polymers revealed quite stable electroactivity during repeated redox switching up to 500 times. The optoelectrochemistry studies also showed distinct color changes of the polymers upon changing the doping state, indicating strong absorption peaks at 400~600 nm in reduced states and complete bleaching in fully oxidized states.

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Chemical synthesis of highly electrically conductive polypyrrole

Cited by 370 publications

References 11 publications

Polypyrrole-modified starch films: structural, thermal, morphological and electrical characterization

Polypyrrole-modified starch films: structural, thermal, morphological and electrical characterization

A study of the effects of acid on the polymerisation of pyrrole, on the oxidative polymerisation of pyrrole and on polypyrrole

Chemical and Electrochemical Synthesis of Highly Conductive and Processable PolyProDOP-alkyl Derivatives

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