Copolymerization of aniline and styrene using various surfactants in aqueous media

Abstract

Polyaniline/polystyrene (PAn/PS) copolymer was prepared in the aqueous solution by copolymerization of styrene and aniline using potassium iodate (KIO 3 ) and ammonium persulfate ((NH 4 ) 2 S 2 O 8 ) as an oxidant in the presence of various surfactants such as poly(ethylene glycol), hydroxypropylcellulose, and surfactive dopant sodium dodecylbenzenesulfonate. The PAn/PS copolymer was characterized in terms of conductivity, morphology, chemical structure, and glass transition temperature. The results indicate that the morphology, conductivity, and glass transition temperature of products are dependent on the type of surfactant. Furthermore, it was found that addition of styrene monomer into stirred aqueous solution influences the surface morphology. The chemical structure and glass transition temperature of product were studied by Fourier transform infrared spectroscopy and differential scanning calorimetry respectively. POLYM. COMPOS.,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]

Simultaneous Cryogenic Radical and Oxidative Coupling Polymerizations to Polyaniline/Polyacrylamide Conductive Cryogels for Gas Sensing

“…Eisazadeh and Kavian [ 29 ] ever reported the copolymerization of aniline and styrene (St) in emulsion state, investigated the influences of surfactant and found the presence of two monomer residues in the so-called copolymers. However, there was no explanation about no interference of ANI to radical polymerization of St. We assume that the protonation of ANI is the key-point, where the protonated aniline and its inheritors, such as nitrenium cations would have decreased activity to retard radical polymerization of vinyl monomers.…”

“…Simultaneous cryogenic radical and oxidative coupling polymerizations would facilitate the formation of composite cryogels with uniform distribution of conductive polymer in the matrix. However, as far as we know, there is only one report about the concurrence of oxidative coupling polymerization and radical polymerization in the presence of sulfuric acid (1 M) [ 29 ], in which the reason was not disclosed.…”

Synthesis of Processable Conducting Polyaniline Nanocomposite Based on Novel Methodology

“…Improvement of these material properties can be achieved by forming copolymers, composites, or blends with commercially available polymers or with inorganic materials which offer better mechanical and optical properties, stability, process ability [19][20][21][22][23][24][25].…”

“…The insolubility in common solvents and infusibility of conducting polymers, in general, make them poorly processable, either by a solution technique or by melt processing methods [17,18]. Improvement of these material properties can be achieved by forming copolymers, composites, or blends with commercially available polymers or with inorganic materials which offer better mechanical and optical properties, stability, process ability [19][20][21][22][23][24][25].…”