Synthesis and characterization of conducting copolymers from aniline and o‐anisidine in HCl solutions

Abstract

Conducting poly(aniline-co-o-anisidine) (PAS) films with different ratios of aniline units in the polymer chain were prepared by oxidative polymerization of different molar ratios of aniline and o-anisidine in 1 M HCl using cyclic voltammetry. Due to the much higher reactivity of o-anisidine, the structure and properties of PASs were found to be dominated by the o-anisidine units. The polymerization of poly-o-anisidine and PASs followed zero-order kinetics with respect to formation of the polymer (film thickness) and the autocatalytic polymerization of aniline was completely inhibited. In contrast to polyaniline, a decrease in the polymerization temperature was found to increase the amount of copolymer formed and its redox charge. The presence of aniline units in PASs led to a pronounced increase in the molecular weight and conductivity, and a decrease in the solubility in organic solvents. Repetitive charging/discharging cycles showed that PASs resist degradation more than polyaniline.

Electrochemomechanical properties of aniline/2-methoxyaniline copolymers

“…6b and d below). The general features are similar to those found in the literature [40,77] for thinner films. The peak potential shifts anodically as F a decreases whereas the peak width is lower for the copolymers than the homopolymers.…”

Copolymers of aniline and o‐methoxyaniline. II. Thermoanalytical studies

“…Synthesis in the presence of two different monomers has shown preferential polymerization of the monomer with lower oxidation potential. 16,19,20 Thus, a smaller amount of MANI oligomers and nonpolymerized monomer than Figure 2 Mass loss determined on heating up to gradually rising programmed temperature and subsequent quenching of 1, PANI-EB, 2, PMANI-EB, and 3, PMANI-ES, versus final heating temperature.…”

“…These acids ''compatibilize'' PANI also with other polymers of similar molecular structure, facilitating the blending and processing by conventional technique. [9][10][11][12][13] It was also found that the homopolymerization of ANI derivatives (e.g., alkyl 14,15 and alkoxyl [16][17][18][19][20] ring-substituted ANIs) or their copolymerization with ANI results in better solubility of the obtained polymers. Copolymers of ANI and o-methoxyaniline (MANI) with good solubility characteristics had been recently prepared and described in our previous article.…”

Preparation of electrospun electroactive POMA fiber mats

“…1(a), curve A, shows the characteristic stretching peaks of POMA at wavenumbers of 1255 and 1025 cm −1 , which were assigned to COC stretching of the alkyl aryl ether linkage. In addition, the characteristic bands at wavenumbers of 1409 and 1366 cm −1 were assigned to the in‐plane CH bending of the methyl group 49–51. Furthermore, UV‐visible absorption spectra of the PANI family were obtained in an NMP solution, as shown in Fig.…”