Combined electrochemical and chemical synthesis of thick polypyrrole layers and their characterization

Abstract

The presence of pyridinium chlorochromate as an oxidizing agent in acetonitrile solution containing the monomer and the doping agent significantly accelerates electrochemical polymerization of pyrrole. The thickness of poly pyrrole layers produced by this combined electrochemical and chemical synthesis reaches several milimetres for the 60 min polymerization reaction. The influence of pyridinium chlorochromate concentration on the rate of polymer formation and the amount of released gas was investigated during the combined synthesis of polypyrrole. The polypyrrole prepared was characterized by ESCA analysis.

Dopant effect and characterization of polypyrrole-cellulose composites prepared by in situ polymerization process

“…1. Several research groups (Håkansson et al 2006;Furukawa et al 1988;Omastová et al 1994) had made the assignments of vibration modes of PPy. There was no characteristic absorption associated with pyrrole ring in spectrum of Fig.…”

Polypyrrole-modified starch films: structural, thermal, morphological and electrical characterization

“…Several research groups [25,[40][41][42][43][44] have made the assignments of vibration modes of PPy. The spectra e of Figure 3 (polypyrrole powder synthesized with FeCl 3 , so called PPy-Cl) contains bands at 1540 cm −1 (C-C stretching vibrations in pyrrole ring) [25], at 1459 cm -1 (C-N stretching vibration in the ring) [25]; from 1400 cm -1 to 1250 cm -1 (broad band, C-H or C-N in-plane deformation modes of secondary aromatic amines) [25,42], bands from 1250 to 1100 cm -1 (vibrations of the pyrrole ring) [25], characteristic for oxidized polypyrrole.…”

Aqueous Electrosyntheses of Homo and Copolymers of Pyrrole and Aniline in a Binary Electrolyte System

“…Figure 6a and b shows the comparison of the FTIR spectra for PPy electrosynthesized in PTSA with and without KCl, respectively. Several research groups [62][63][64] have assigned the vibrational modes of PPy. The band at 1544 cm −1 corresponds to the C-C stretching vibrations in pyrrole ring.…”