Get access

Characterization and anticorrosive properties of poly(2,3-dimethylaniline)/Na+-montmorillonite composite prepared by emulsion polymerization


Correspondence to: L. Ma (E-mail:


Composites of Poly(2,3-dimethylaniline) and inorganic Na+-montmorillonite clay were synthesized by emulsion polymerization. The as-synthesized composites (PDMA) were characterized by Fourier Transform Infrared Spectroscopy, X-ray diffraction, and scanning electron microscopy. The protective performance against corrosion of the samples was evaluated by Tafel and electrochemical impedance spectroscopy measurements. The results showed that the composite containing 5 wt. % of clay loading (PDMA-5%) displayed a better anticorrosive performance than other samples. The Epoxy(E) blend with PDMA-5% (EPM5) coating was founded to have a higher corrosion potential and a lower current density than that of Epoxy blend P(2,3-DMA) (EP) coating. The impedance value of EPM5 coating was about 6.68×106Ω·cm2 in 5 wt. % NaCl solution even after 288 h, compared to EP (4.26×105Ω·cm2) coating, which went to show that the corrosion inhibition of P(2,3-DMA) could be effectively enhanced by incorporating MMT into the P(2,3-DMA) matrix. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4528–4533, 2013