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Synthesis, characterization and antimicrobial activity of ResorcinolMelamine-Formaldehyde resin

Synthesis, characterization and antimicrobial activity of ResorcinolMelamine-Formaldehyde resin

A copolymer was synthesized from resorcinol and melamine using formaldehyde as a cross linking agent at 126 0C in 2M HCl medium. The resin was characterized by elemental analysis, FTIR and NMR spectra. The RMF resin was tested for its inhibitory action against pathogenic bacteria and fungi. The resin show potent inhibitory action against bacteria such as Escherichia coli, Klebseilla, Staphylococcus aureus and Pseudomonas aeruginosa and fungi viz. Aspergillus flavus, Aspergillus niger, Pencillium species, Candida albicans, Cryptococcus neoformans and Mucor species. The copolymer resin is soluble in DMF, DMSO, THF, conc. H2SO4.

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Terpolymerization of 2-hydroxyacetophenone, catechol and formaldehyde and its thermal studies

Terpolymerization of 2-hydroxyacetophenone, catechol and formaldehyde and its thermal studies

The copolymer has been synthesized by the polycondesation technique of 2-hydroxyacetophenone with catechol and formaldehyde in the presence of 2M HCl as a catalyst. The copolymer has been characterized by UV-visible, IR and 1H NMR spectra. The thermal decomposition behavior of new copolymer was studied using thermogravimetric analysis in air atmosphere. Thermal decomposition curves are discussed with careful attention to minute details. The freeman-Carroll and Sharp-Wentworth methods have been used to calculate activation energy and thermal stability. Thermal activation energy (Ea) calculated with the help of these methods are in agreement with each other. Thermodynamic parameters such as free energy change (∆F), entropy change (∆S), Apparent entropy change(S*) and frequency factor Z are also determined on the basis of TG curves and by using data of the FreemanCarroll method. Scanning electron microscopy (SEM) was used to establish the surface morphology and nature of the copolymer.

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99 views • 8 slides

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