Pyrrole–styrene graft copolymers

Nazzal, A. I.; Street, G. B.

doi:10.1039/c39850000375

Cited by 117 publications

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“…42,43 Note that the variations of surface morphology and swelling/contraction of PPy films have also been investigated by in situ STM during the dopingdedoping processes. 47 46 Note also that some attempts have been made to assess the molecular weight of electrodeposited PPy.…”

Section: Other Analytical Techniquesmentioning

confidence: 99%

The mechanisms of pyrrole electropolymerization

et al. 2000

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Over the past twenty years, polypyrrole has appeared as the most extensively studied conducting polymer. However, despite the volume of work already done in this area, there has been little focus put on the mechanism of polypyrrole synthesis, especially concerning the most efficient method, electropolymerization. Numerous analytical techniques have been used to study polypyrrole electrodeposition and/or doping. However, the mechanism itself is still a controversial subject as there is not one mechanism which is universally accepted. The mechanism proposed by Diaz is the one most commonly referred to in the literature although several other mechanisms are not lacking in support. The controversy lies in the initiation step as each mechanism proposes a different way of beginning the reaction, varying between electron transfer, proton transfer and direct radical pyrrole formation. Without considering the initiation step, there are many other factors including electrolyte, solvent, temperature and pH which can influence the reaction mechanism during the electropolymerization of pyrrole, thus impacting the characteristics of the polymer formed at the electrode. Dr Saïd Sadki is an associate Professor in Physical Chemistryand Electrochemistry at the University of Cergy Pontoise (France). He obtained his PhD degree from the University of Paris VI where he studied the fabrication of organic accumulators using polyparaphenylene and polypyrrole electrodes. His research interests include the synthesis and electrochemistry of conducting polymers for anti-corrosion coatings, electrochromic devices, sensors and actuators.

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Section: Other Analytical Techniquesmentioning

confidence: 99%

The mechanisms of pyrrole electropolymerization

et al. 2000

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“…Since most of the conducting polymers are not processable, much of the efforts made in this field have been directed towards circumventing this problem. To solve this problem, various approaches have been tried, including addition of side groups to the polymer backbone [9], grafting of polymers to a non-conducting polymer [10], direct polymerization of intractable polymers into the final desired shape, making a composite of blend of conducting polymers [11] [12] and copolymerization [13]. Better processability may be achieved either by the synthesis on PANI in nano-micro scale particle, which is easier to disperse in a polymer matrix or by using an appropriate emulsifier which enhances the optical and electrical properties of PANI.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Perfluorooctanoic Acid Anionic Surfactant Doped Nanosize Polyaniline

Mahalakshmi¹,

Vedhi²

2014

OJSTA

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Surfactant doped polyaniline was synthesized in the aqueous solution of aniline and anionic surfactant of perfluorooctanoic acid (PFO) by chemical synthesis using potassium peroxy disulphate as an oxidant by varying the aniline to surfactant ratio. The solubility of the chemically prepared surfactant doped polyaniline (PANI) was ascertained and it showed good solubility in dimethyl sulfoxide (DMSO), dimethylformamide (DMF), acetone, acetonitrile, ethanol, aceticacid, trichloroethylene, dichloromethane, tetrahydrofuran, ethylacetate, diethylether, toluene, chloroform and sparingly soluble in n-hexane and water. The prepared polymers were characterized by fourier transform infrared spectroscopy (FTIR), UV-visible, X-ray diffraction (XRD), cyclic voltammetric (CV), EIS and scanning electron microscopy (SEM). The analysis of UV-visible and FTIR showed that aniline has been polymerized to PANI in its conducting emeraldine form. FTIR spectra showed that the peaks at 1670, 3315 and 1400 cm −1 corresponded to PFO. FTIR spectra showed that amine peak observed at 1593 cm −1 was shifted to lower wave number due to the interaction between PANI and the surfactant. SEM analysis showed that the variation in morphology of doped PANI was predominantly dependent on the concentration of the surfactant. Elemental analysis was done by energy dispersive spectroscopic (EDAX) which shows the presence of C, N, O, S and F. XRD pattern showed that the formation of nanosized (18 nm) and crystalline polymer. CV studies of the synthesized polymer exhibited good adherent behavior on electrode surface. It exhibited three oxidation peaks at approximately 0.283 V, 0.541 V and 0.989 V and two reduction peaks at 0.1421 and 0.3854 V. Electrical conductivity of PFO doped PANI was studied by impedance spectroscopic method.

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“…As most of the conducting polymers are not process able, many of the efforts made in this field have been directed toward circumventing this problem. To solve it, various approaches have been tried, including the addition of side group to the polymer backbone [28] grafting of polymers onto a no conducting polymer [29] , direct polymerization of intractable polymers into the final desired shape, making a blend of conducting polymers [30,31] and copolymerization [32] . In the present study polythiophene Al 2 O 3 nanoparticles were prepared by using DBSNa as a surfactant.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Polythiophene Containing Al₂O₃Nanoparticles Using Sodium Dodecylbenzenesulfonate as a Surfactant

Mohsenpour¹,

Eisazadeh²

2014

Polymer-Plastics Technology and Engineering

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Nanocomposite and composite PTh/Al 2 O 3 nanoparticles were prepared in aqueous media by using sodium dodecylbenzenesulfonate (DBSNa) as a surfactant. Al 2 O 3 nanoparticles were coated with PTh using a chemical oxidative polymerization method. The chemical structure and surface morphology of PTh/Al 2 O 3 nanoparticles were characterized by X-ray diffraction and scanning electron microscopy. The results indicate that the type of surfactant and Al 2 O 3 influence the size and homogeneity of particles.

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Pyrrole–styrene graft copolymers

Cited by 117 publications

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The mechanisms of pyrrole electropolymerization

The mechanisms of pyrrole electropolymerization

Synthesis and Characterization of Perfluorooctanoic Acid Anionic Surfactant Doped Nanosize Polyaniline

Preparation and Characterization of Polythiophene Containing Al₂O₃Nanoparticles Using Sodium Dodecylbenzenesulfonate as a Surfactant

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Pyrrole–styrene graft copolymers

Cited by 117 publications

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The mechanisms of pyrrole electropolymerization

The mechanisms of pyrrole electropolymerization

Synthesis and Characterization of Perfluorooctanoic Acid Anionic Surfactant Doped Nanosize Polyaniline

Preparation and Characterization of Polythiophene Containing Al2O3Nanoparticles Using Sodium Dodecylbenzenesulfonate as a Surfactant

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Preparation and Characterization of Polythiophene Containing Al₂O₃Nanoparticles Using Sodium Dodecylbenzenesulfonate as a Surfactant