Facile synthesis of poly(p-phenylenediamine)/MWCNT nanocomposites and characterization for investigation of structural effects of carbon nanotubes

Abstract

Poly(p-phenylenediamine) (PpPD)/carboxylic acid-functionalized multiwalled carbon nanotubes (c-MWCNTs) nanocomposites were prepared by chemical oxidative polymerization using potassium persulfate (K 2 S 2 O 8 ) as an oxidant. Field-emission scanning electron microscopy (FE-SEM) and field-emission transmission electron microscopy (FE-TEM) showed that a tubular layer of PpPD was coated on the surface of carbon nanotubes with a thickness of 10-20 nm. FT-IR analysis provided an evidence for the formation of nanocomposites. The thermal stability of nanocomposites was improved by addition of c-MWCNTs as confirmed by thermogravimetric analysis (TGA). XRD spectra showed that the crystalline nature of PpPD was not affected much by the addition of c-MWCNTs. As the content of c-MWCNTs was increased, the electrical conductivity of the nanocomposites increased due to the interaction between polymer and nanotubes that enhances electron delocalization.

Preparation and electrochemical and electrochromic properties of wrinkled poly(N-methylthionine) film

“…3334 cm À1 corresponding to the secondary amino (À ÀNHÀ À) group in the polymer. This means that the transformation of a primary amine to a secondary amine after polymerization [18]. Four weak peaks at 3745, 3091, 2927 and 2857 cm À1 appear in the polymer spectrum, respectively.…”

“…Recently, aromatic diamine polymers are generally considered more attractive since they exhibit more novel multifunctionality than polyaniline derivatives because of one free amino group per repetitive unit on the former polymer chains [18,19]. Thus, aromatic diamines have been applied in design and synthesis of new polymers with the aim of acquiring better chemical functionality and physicochemical properties.…”

Epoxy/p‐phenylenediamine functionalized graphene oxide composites and evaluation of their fracture toughness and tensile properties

“…The carboxylic group in GO was reduced, and one of the two primary amine groups in the pPDA molecule was oxidized. 21,31 Then, GO acted as the oxidizing agent for the oxidative polymerization process. The chemical oxidative polymerization of pPDA in acidic medium resulted in fine, uniform polymer particles.…”

Spectroscopic studies on pure and histidine functionalized MWCNTs

“…The various concentrations of histidine functionalized MWCNTs were prepared [2]. EPR, FTIR and UV-Vis spectra were recorded.…”