Abstract
In this paper linseed oil based metallopolyesteramides (Mn(II)-/Co(II)-/Cu(II)-LPEA) containing metals [with half filled (d 5) and partially filled (d 7 and d 9) d orbitals] were synthesized via green route for the application of eco-friendly protective green material. This paper also described the role of occupancy of d orbitals on the performance of such polymers. The synthesis reaction was carried out in situ through condensation polymerization among linseed fatty amide diol (HELA), phthalic anhydride and respective metal acetates [M (OCOCH3)2; M = Mn(II), Co(II), Cu(II); different mole ratios] in absence of any harmful organic solvent. The structural determination (FTIR, 1H-NMR and 13C-NMR), curing, thermal, physico-chemical, physico-mechanical, anticorrosive/chemical resistance, antibacterial properties of Mn(II)-/Co(II)-/Cu(II)-LPEA were carried out. The curing mechanism of the resin was confirmed by the comparison of FTIR spectra of uncured and cured resin. The curing mechanism of Mn(II)-/Co(II)-/Cu(II)-LPEA is found to be contrary to that of reported oil based polymer that involves the lipid autoxidation (slow process) in which driers are required to speed up the room temperature curing process. The incorporation of metals in Mn(II)-/Co(II)-/Cu(II)-LPEA improved the thermal stability as compared to virgin linseed oil based polyesteramide (LPEA). Mn(II)-/Co(II)-/Cu(II)-LPEA also show excellent antibacterial performance against Staphylococcus aureus and Escherichia coli. The observed diversity in material properties suggests that Mn-LPEA may be useful as an eco-friendly protective green material with thermal stability up to 320–330 °C.
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Acknowledgments
Dr Fahmina Zafar (Pool Officer) and Dr Eram Sharmin (Pool Officer) are thankful to CSIR, New Delhi, India for Senior Research Associateships against for Grant No. 13 (8385-A)/Pool/2010 and 13 (8464-A)/2011-Pool, respectively. The Head, Department of Chemistry, Jamia Millia Islamia, New Delhi, is being acknowledged for providing access to all the laboratory facilities to carry out the research work.
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S. M. Ashraf—retired.
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Zafar, F., Zafar, H., Sharmin, E. et al. Studies on Ambient Cured Biobased Mn(II), Co(II) and Cu(II) Containing Metallopolyesteramides. J Inorg Organomet Polym 21, 646–654 (2011). https://doi.org/10.1007/s10904-011-9512-8
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DOI: https://doi.org/10.1007/s10904-011-9512-8