Synthesis and characterization of nanosized polypyrrole–polystyrene composite particles

Abstract

Nanosized polypyrrole-polystyrene (PPy-PS) composite particles were synthesized by the polymerization of pyrrole on PS nanoparticles in the presence of FeCl 3 . The PS nanoparticles were prepared from microemulsion polymerizations using the cationic nonpolymerizable surfactant cetyltrimethylammonium bromide (CTAB), the nonionic polymerizable surfactant -methoxy[poly(ethylene oxide) 40 ]undecyl ␣-methacrylate (PEO-R-MA-40), or the cationic polymerizable surfactant -acryloyloxyundecyltrimethylammonium bromide (AUTMAB). For the latexes stabilized by CTAB, the resulting PPy-PS composite particles exhibited relatively poor colloidal stability and the pressed pellets exhibited relatively low electrical conductivities (ϳ10 Ϫ7-10 Ϫ3 S cm Ϫ1 ). However, for the latexes stabilized by polymerizable surfactants, the resulting PPy-PS composite particles exhibited relatively good colloidal stability and relatively high conductivities (ϳ10 Ϫ5 -10 Ϫ1 S cm Ϫ1 ). The effect of polymerizable surfactants on the colloidal stability of composite particles and the conducting mechanism of the composites are discussed.

Electrically Conductive Polystyrene/Polypyrrole Nanocomposites Prepared via Emulsion Polymerization

“…1a) the peaks at 3028 cm À1 and 2924 cm À1 indicated the stretching of aromatic C-H and aliphatic CH 2 , respectively and that the aromatic C¼C stretching peak range around 1602-1453 cm À1 [30,34] . The bands at 757 and 699 cm À1 are assigned to the deformation of five adjacent hydrogen atoms in the benzene ring [30,34,36,37] . The spectrum of the PPy (Fig.…”

“…Xu et al [30] prepared PPy-PS nanocomposite by the polymerization of pyrrole on PS nanoparticles in the presence of FeCl 3 . In the other work, the optical and dielectric properties of PPy nanoparticles in a polyvinylalcohol (PVA) matrix were investigated [31] .…”

Preparation of HPMC–EA–DMAEMA nanosized latex

“…There has recently been increased interest in the preparation of nanosized polymer latex (Ming et al 1998;Xu et al 2004;Bindal et al 2002). A variety of techniques and characterization tools have been developed for preparation and study these particles.…”