Development of Poly(urethane esteramide) Coatings from Pongamia glabra Oil as Anticorrosive Applications |
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Authors: | Manawwer Alam Naser M Alandis |
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Institution: | 1. Research Center, College of Science, King Saud University, Riyadh, Saudi Arabia;2. Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia |
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Abstract: | In this study, ethylene glycol polyesteramide (Eg-PEA) was synthesized from N,N-bis (2-hydroxy ethyl) pongamia oil fatty amide and ethylene glycol tetraacetic acid (EGTA) through condensation polymerization. It was further modified by toluene 2,4-diisocynate in different wt.% (20, 25, 30, and 35) to obtain urethane-modified polyesteramide (Eg-UPEA). The synthesized resins were characterized using FT-IR, 1H NMR, and 13C NMR spectroscopic techniques, and molecular weight was determined by gel permeation chromatography (GPC). Physico-chemical and physico-mechanical analyses were carried out by standard laboratory methods. Thermal studies of Eg-UPEA were undertaken by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques. To evaluate corrosion prevention performance Eg-UPEA-coated mild steel strips were investigated by potentiodynamic polarization in different corrosive media (5 wt.% NaCl, 3 wt.% HCL, 2.5 wt.% NaOH, and tap water) at room temperature. Thermal analysis revealed that Eg-UPEA30 may find application as an environmentally friendly corrosion protective coating and may be safely used up to 250°C. |
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Keywords: | Ethylene glycol tetraacetic acid Polyesteramide Pongamia oil |
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