Synthesis and characterization of polypyrrole rod doped with p‐toluenesulfonic acid via micelle formation

Abstract

Rod-type polypyrrole (PPY) doped with ptoluenesulfonic acid (TSA) was synthesized by chemical oxidative polymerization via a self-assembly process. The shape of the PPY particles is mainly determined by the ratio of TSA/pyrrole (PY) and feed rate of the oxidant. Particle of different shapes (rod, grain, and partially rod) exhibit differences in morphology, electrical properties, dispersity, and thermal properties. Wide-angle X-ray diffraction patterning analysis was used to investigate the mechanism of rod formation. The effect of the TSA concentration on the PPY structure was investigated using Fourier transform infrared spectroscopy. The PPY rods doped with TSA exhibited better electrical conductivity than granular PPY doped with TSA, and their dispersity and thermal stability were also higher. Self-orientation of PPY in the micelles of TSA and high crystallinity of the rod particles led to improved thermal stability. Hence, the decomposition temperature of the polymer chain was considerably increased.

A structural and morphological comparative study between chemically synthesized and photopolymerized poly(pyrrole)

“…The peak at 3100 cm À1 in PPY-3 and PPY-7 belongs to the aromatic C-H group stretching frequency. 15,17 The reason for the absence of the stretching frequencies at 3446 and 3340 cm À1 in the photopolymerized poly(pyrrole) samples, at this point, is unclear. Further experimentation will be conducted to provide a basis for understanding the cause of the absence of the aforementioned frequencies.…”

“…Kim et al synthesized rod-type poly(pyrrole) doped via micelle formation with p-toluenesulfonic acid (pTSA), which has higher water solubility than DBSA and NSA. 17 Doped poly(pyrrole) samples were prepared with different concentrations of pTSA. It was found that the best result could be obtained when the ratio of pTSA to pyrrole monomer was 2:0.…”

Adsorption of Free Hemoglobin by Electrochemically Modified Activated Carbons. Part 1. Aqueous Solutions

“…Значение потенциала выбиралось в соответствии с литературными данными. [5,6] В качестве вспомогательного электрода использовался листовой термически расширенный графит (ТРГ). После проведения электрополимеризации модифицированные образцы углей хранились в фосфатном буферном растворе при рН = 7,40.…”

Chemical synthesis of hollow sea urchin like nanostructured polypyrrole particles through a core–shell redox mechanism using a MnO2 powder as oxidizing agent and sacrificial nanostructured template

“…Figure 3, XRD pattern exhibits a weak and broad diffraction peak at 2 = 25°, which has already been encountered in literature and attributed to amorphous PPy structures [47][48][49][50][51]. Figure 4 presents the Raman spectrum corresponding to polypyrrole powder synthesized by using γ-MnO 2 .…”