Characterization of conducting polyaniline blends by Resonance Raman Spectroscopy

Abstract

A microscopia óptica juntamente com a espectroscopia Raman no modo microscópico foram utilizadas para investigar as possíveis interações entre a polianilina (PANI) e diferentes polímeros isolantes em diversas blendas condutoras. Interações físicas podem ser inferidas através da análise das intensidades relativas das bandas em 574 e 607 cm -1. A condutividade do material e as intensidades relativas destas bandas Raman são também analisadas.Raman and optical microscopy were used to investigate possible interactions between polyaniline (PANI) and different insulating polymers in conducting blends. Resonance Raman and optical micrographs were used to study the physical interaction in materials. Analysis Raman spectra was done investigating the relative intensity of bands at 574 and 607 cm -1. A relationship between Raman bands and conductivity was also proposed.

Investigation of charge transport properties in conducting copolymers of aniline with 3‐aminobenzenesulfonic acid for their applications as antistatic encapsulation materials blended with low‐density polyethylene

“…It also improves the processibility of polyaniline, allowing the formulation of new materials with specific properties for desired applications. From the literature, we note that 2.0 wt% loading of polyaniline in an insulating polymer matrix like polystyrene or poly(methyl methacrylate) gives a static decay time of 0.02 or 0.09 s, respectively. Barra et al .…”

D.C electrical conductivity of prepared pure and doped polyaniline salt

“…It can changes the electronic conductivity about (10) orders of magnitude, passing from insulator state (emeraldine base with s <10-10 S/cm) to metallic conduction (emeraldine salt with s ~10 -1 -10 2 S/cm), depending upon the protonation degree [7,8]. These properties are optimal at stoechiometrical ratio between the oxidant, hydrochloric/ sulfuric acid and aniline [9,10]. The aspect which attracted our interest is the protonated structure of polyaniline in the acidic media ( Fig.1) Polyaniline in its sulfonated form shows a close structure with the ion conducting polymers, where the inorganic anions are represented by HSO 4 species.…”

Chemical modification of polyaniline by N-grafting of polystyrenic chains synthesized via nitroxide-mediated polymerization

“…[1][2][3][4][5] Among the known conducting polymers, polyaniline (PANI) has been extensively studied due to its unique electrochemical and physicochemical behaviour, good environmental stability and relatively easy preparation. 6,7 However, polyaniline is inherently brittle and poor in processability due to its insolubility in common organic solvents.…”