ELECTRICALLY CONDUCTIVE POLY(METHYL METHACRYLATE-G-PYRROLE) VIA CHEMICAL OXIDATIVE POLYMERIZATION

Methyl methacrylate (MMA) and 2-bromoethyl methacrylate (BEMA) were copolymerized and the reactivity ratios of the monomers were determined. A pyrrole moiety was introduced into the copolymer via polymer analogous reaction and grafting between this molecule and pyrrole was achieved by chemical oxidative polymerization of pyrrole with iron-(III) chloride. Conductivities of 10(-2) S/cm were measured

ELECTROCHEMICAL STUDIES ON CARBAZOLE/PYRROLE-COPOLYMERS

We investigated the copolymerization of pyrrole and N-methylpyrrole with N-vinylcarbazole (NVC) and N-ethylcarbazole. The grafting of pyrrole onto poly(N-vinylcarbazole) was examined. The resulting conducting polymers were characterized via cyclic voltammetry and conductivity measurements. Alternating copolymers were synthesized via a novel dipyrrolylcarbazole derivative

ELECTROCHROMIC FILMS OF VINYLCARBAZOLE DERIVATIVES

Several vinylcarbazole derivatives were electrochemically polymerized into electrochromic films with electrical conductivities in the range of 10(-4) to 10(-7) S/cm. The characteristic white/green color change upon doping was due to bicarbazolyl groups. The cyclic voltammograms of the monomers revealed small differences due to the various positions of the vinyl group on the ring

POLY(3-PHENYL AZOPYRROLE)S - A NEW CLASS OF CONDUCTING POLYMERS IN THE POLY(PYRROLE) SERIES

Several monosubstituted 3-arylazopyrrole derivatives were synthesized for the first time. The oxidation potentials were correlated to the Hammett constants of the substituents. Cyclic voltammetry studies revealed several interesting, features concerning the new compounds. Electrochemical homopolymerizations as well as copolymerization with pyrrole were performed

STRUCTURAL STUDIES OF POLYPYRROLES - OLIGOMERIZATION MECHANISM OF N-METHACRYLOYL PYRROLE

The oligomerization mechanism of N-methacryloyl pyrrole was studied using semiempirical calculations. Starting with the monomer, a large number of dimer, trimer and tetramer structures were optimized. On comparison of alpha-alpha, alpha-beta and beta-beta type pyrrole-pyrrole linkages, it was found that beta-beta type bonding is the most stable form. On average, the introduction of one alpha-type linkage requires about 5 kcal mol-1 of energy

THE INFLUENCE OF WATER ON THE ELECTROCHEMICAL POLYMERIZATION OF 3-ACYLPYRROLES

Several poly(3-acylpyrrole)s have been studied by cyclic voltammetry. The influence of some common impurities like water and cyanide present in the solvent-electrolyte system on the redox behavior of the polymer films were emphasized. Due to the presence of such impurities we have also observed changes in the macroscopic properties of the films such as their electrical conductivities. There is enough evidence that the amount of such impurities can be correlated to the degree of the so called overoxidation process

Electrically conductive polymer grafts prepared by electrochemical polymerization of pyrrole onto poly[(methyl methacrylate)-co-(2-(N-pyrrolyl) ethyl methacrylate)] electrodes

Pyrrole was grafted on poly[(methyl methacrylate)-co-(2-(N-pyrrolyl) ethyl methacrylate)] (PMMA-co-PEMA) using constant potential electrolyses. The thermal stability of PMMA-co-PEMA was improved as a result of electrochemical grafting with pyrrole. The electrochemical behavior of the films was studied by cyclic voltammetry. Pyrrole was found to be electroactive on PMMA-co-PEMA electrodes

Polypyrrole grafts synthesized via electrochemical polymerization

Electrically conducting polypyrrole grafts with poly[(methyl meth acrylate)-co-(2-(N-pyrrolyl) ethyl methacrylate)] (PMMA-co-PEMA) were synthesized by constant potential electrolysis. Cyclic Voltammetry, DSC, TGA, SEM and elemental analysis were used in order to characterize the free standing films. Conductivities of the polymers were measured by a four-probe technique

DERIVATIVES OF POLY(PYRROLE) WITH DECONJUGATED CARBONYL SUBSTITUENTS IN BETA-POSITION

Four omega-(3-pyrrolyl)esters were investigated by cyclic voltammetry, electron microscopy and conductivity measurements. The corresponding poly(pyrrole) derivatives exhibit enhanced conductivities compared to poly(3-acylpyrrole)s, and their electrochemical behavior resembles that of poly(3-alkylpyrrole)s rather than the poly(3-acylpyrrole) derivatives. Ester saponification occurring during electropolymerization was examined by gas chromatography