polyaniline

Dielectric Behavior of SBS/Polyaniline Thermally Processable Blends

Styrene–butadiene–styrene triblock copolymer (SBS) blends were prepared using different weight ratios of conducting polyaniline (PANI). Several electrical properties such as volume resistivity, dielectric constant, dissipation factor and alternating current conductivity of the blends were studied pointing to understand the influence of different parameters like PANI concentration, frequency, and temperature on these properties.

Impact of Conducting Polymer Filler on the Dielectric Properties of Nylon 11

The dielectric studies of semi-crystalline Nylon 11 filled with a conducting polymer (PANI) were investigated in a wide range of frequency and temperature by using Impedance Analyzer. The main focus was on the effects of conducting filler content on dielectric properties of Nylon 11. The prominent factors such as dielectric permittivity, loss factor, and loss tangent were studied at high frequency. Two different concentrations (1 % and 5 % w/w) of the conducting filler were used.

Synthesis of polyaniline in presence of low magnetic field, its structure and electrical properties

Polyaniline is synthesized chemically under the influence of low magnetic field of intensity 1KGauss. The effect of magnetic field during the synthesis process causes enhancement of electrical conductivity by two orders of magnitude. This increased electrical conductivity depends on the polymer chain ordering, as well as structure and morphology of the reported polymer.

Synthesis and Characterization of Polyaniline Nanofibres by Rapid Liquid-Liquid Interfacial Polymerization Method

Inherently conducting polymer polyaniline (Pani) has been synthesized by a novel interfacial polymerization technique using trichloroethane as organic media. Ammonium peroxydisulphate was used as an oxidizing agent dissolved in aqueous media. The synthesized polymer was subjected to the physico-chemical characterization by UV-Vis and FT-IR Spectroscopy and Scanning Electron Microscopy. From the SEM Micrographs it was observed that interfacial polymerization offers the fibrillar type of morphology having 200 nm sized fibers.

Synthesis and Characterization of Organically Soluble and Electrically Conducting Acids Doped Polyaniline

Emeraldin salt of polyaniline was synthesized by chemical oxidative polymerization method; this salt is soluble in common organic solvents. The obtained results are discussed with reference to lactic acid doped polyaniline. It has been observed that acrylic acid doped polyaniline is comparatively more soluble than polyaniline doped with lactic acid in common organic solvent such as m-cresol, NMP (N-methyl pyrrolidinone), DMSO, DMF, etc. The acrylic acid doped polymer prepared using lactic acid is comparatively more soluble in m-cresol and NMP than the polyaniline without acrylic acid.

Catalytic Activity of Polymer-Supported Cobalt(II) Catalysts in the Oxidation of Alkenes

The oxidation of organic compounds with carbon-carbon double bond with using of molecular oxygen under atmospheric pressure in the presence of new polyaniline supported catalyst 1 and 2 has been studied. These catalysts turned out to be efficient and selective for oxidation of unsaturated organic compounds as well as oxidation of hydrocarbon in benzyl position. Oxidation of alkenes and cycloalkenes gives corresponding epoxy derivatives, whereas oxidation of hydrocarbons in benzyl position gives ketones as the main products.

Hybrid Mineral-Polymeric Composite Materials on the Basis of the Polyaniline and Glauconite-Silica

Polyaniline/glauconite-silica (PАn / Gl-Si) composite were obtained by one-step in situ polymerization of aniline in the presence of microdispersion of natural mineral glauconite-silica. The physico-chemical properties (phase content, thermal stability, conductivity and magnetization) of the produced samples of composites with different ratio of components have been studied.

Controlled Synthesis of Nanosized Polyaniline via Unstirred, Liquid-Liquid Interfacial Polymerization Process

Nanorods/nanofibers of polyaniline were synthesized via liquid-liquid interfacial polymerization process using ammonium persulphate as an oxidizing agent. Para-toluene sulphonic acid (p-TSA) was used as a dopant during the polymerization process. The spectroscopic characterization (UV-Vis and FT-IR) confirms the presence of conducting emeraldine salt phase of the polymer. The morphological studies were carried out using FE-SEM analysis.

Studies on the Effect of Doping Agent on the Structure of Polyaniline

Polyaniline (PANI) doped with hydrochloric acid (HCl), sulpharic acid (H2SO4) and formic acid (HCOOH) was synthesized by a chemical oxidative polymerization technique. The oxidizing agent used for this method is potassium dichromate. The polymer products were characterized by FTIR and UV-visible spectroscopy. The FTIR results showed that the doping degree of PANI-HCOOH is the greatest one. A successful doping of HCOOH in PANI was observed in UV-visible spectroscopy. Three steps decomposition observed from the thermo gravimetric analysis (TGA). 

Properties of the Hybrid Glauconite/Polyaniline Composites Synthesized in the Aqueous Citrate Acid Solutions

For the first time the series of the composites of aniline and natural mineral glauconite with different ratio of components has been synthesized by oxidation of aniline by ammonium peroxydisulfate in 0.5 M citrate acid aqueous solutions in the presence of dispersion of mineral filler. X-ray phase analysis confirms the amorphous-crystalline structure of produced composites.