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|Title:||Poly(1-vinylimidazole) formation on copper surfaces via surface-initiated graft polymerization for corrosion protection|
|Authors:||Yuan, S. |
|Source:||Yuan, S., Pehkonen, S.O., Liang, B., Ting, Y.P., Neoh, K.G., Kang, E.T. (2010-06). Poly(1-vinylimidazole) formation on copper surfaces via surface-initiated graft polymerization for corrosion protection. Corrosion Science 52 (6) : 1958-1968. ScholarBank@NUS Repository.|
|Abstract:||To improve the corrosion resistance of copper, poly(1-vinylimidazole) (P(VIDz)) coatings were tethered on copper via surface-initiated free radical graft polymerization of 1-vinylimidazole. An epoxide-containing trimethoxysilane was first coupled to the hydroxyl-enriched substrates for the introduction of polymerization initiator, 4,4′-azobis-(4-cyanpentanoic acid) (ACP). P(VIDz) brushes were subsequently grafted from the polymerization initiator-immobilized surfaces. The electrochemical behavior and anti-corrosion properties of the functionalized copper coupons in 0.5 M HCl solution were investigated by the measurement of open-circuit potential (OCP) temporal variation, Tafel polarization curves, and electrochemical impedance spectroscopy (EIS). As physical barriers to active species with the chelation of nitrogen and/or the π-conjugation of the ring to copper ions, the P(VIDz) coatings exhibited a high corrosion inhibition efficiency. The stability and integrity of the grafted polymers on copper substrates was evaluated by scanning electron microscopy (SEM) and cyclic voltammetry (CV). © 2010 Elsevier Ltd. All rights reserved.|
|Source Title:||Corrosion Science|
|Appears in Collections:||Staff Publications|
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