Synthesis, characterization, and thermal stability of novel poly(azomethine-urethane)s and polyphenol derivatives derived from 2,4-dihydroxy benzaldehyde and toluene-2,4-diisocyanate

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dc.contributor.authorKaya I.
dc.contributor.authorAvci A.
dc.date.accessioned2024-07-22T08:19:31Z
dc.date.available2024-07-22T08:19:31Z
dc.date.issued2012
dc.description.abstractUp to date, only a few kinds of poly(azomethine-urethane)s (PAMUs) were synthesized and studied with thermal degradation steps. However, polyphenol based PAMUs including azomethine linkages have not been investigated yet. The polyurethanes were prepared by condensation reaction of 2,4- dihydroxybenzaldehyde (2,4-DHBA) with toluene-2,4-diisocyanate (TDI) under argon atmosphere. Synthesized polyurethane was converted to its poly(azomethine urethane) species (TP-2AP, TP-3AP, and TP-4AP) by graft copolymerization reactions with amino phenols (2-amino phenol, 3-amino phenol, and 4-amino phenol). Obtained poly(azomethine urethane)s were converted to their polyphenol species (P-TP-2AP, P-TP-3AP, and P-TP-4AP) by oxidative polymerization reaction (OP) using NaOCl as the oxidant. The structures of the obtained compounds were confirmed by FT-IR, UV-vis, 1H NMR, and 13C NMR techniques. The molecular weight distribution parameters of the synthesized compounds were determined by the size exclusion chromatography (SEC). The synthesized compounds were also characterized by solubility tests, TG-DTA, and DSC. Fluorescence measurements were carried out in various concentrated DMF solutions to determine the optimum concentrations to obtain the maximal PL intensities. © 2012 Elsevier B.V.
dc.identifier.DOI-ID10.1016/j.matchemphys.2012.01.021
dc.identifier.issn02540584
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17716
dc.language.isoEnglish
dc.subjectAldehydes
dc.subjectCondensation reactions
dc.subjectDifferential scanning calorimetry
dc.subjectGrafting (chemical)
dc.subjectMolecular weight distribution
dc.subjectPhenols
dc.subjectPolyurethanes
dc.subjectSynthesis (chemical)
dc.subjectThermogravimetric analysis
dc.subjectToluene
dc.subjectAmino-phenols
dc.subjectArgon atmospheres
dc.subjectFluorescence measurements
dc.subjectGraft copolymerization
dc.subjectNMR techniques
dc.subjectOptimum concentration
dc.subjectOxidative polymerization
dc.subjectPL intensity
dc.subjectPoly(azomethine-urethane)s
dc.subjectPolyphenols
dc.subjectSolubility test
dc.subjectWeight distributions
dc.subjectEsters
dc.titleSynthesis, characterization, and thermal stability of novel poly(azomethine-urethane)s and polyphenol derivatives derived from 2,4-dihydroxy benzaldehyde and toluene-2,4-diisocyanate
dc.typeArticle

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