Synthesis and characterization of oligo(phenoxy-imine)s of Schiff bases containing phenyl-1,3,5-triazine unit: limit oxygen index values of oligomers

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dc.authoridKaya, İsmet/0000-0002-9813-2962
dc.contributor.authorKaya, İsmet
dc.contributor.authorCicigül, Melike
dc.contributor.authorYağmur, Hatice Karaer
dc.date.accessioned2025-02-22T14:09:07Z
dc.date.available2025-02-22T14:09:07Z
dc.date.issued2024
dc.departmentDicle Üniversitesi, Fen Fakültesi, Kimya Bölümüen_US
dc.description.abstractAromatic compounds containing hydroxyl groups in their structure are converted to oligomer or polymer products from the combination of phenoxy-structured radical units in the presence of oxidants such as O2, H2O2 and NaOCl in alkaline or acidic aqueous media. These macromolecule compounds are used in many fields in industry because they contain both phenyl units and different functional groups in their structures. Since the phenyl units in the main chain give rigidity to the structure, the thermal stabilities of these types of polymers are quite good. Schiff base compounds were obtained as a result of the condensation reaction of 4-hydroxy-3-methoxybenzaldehyde, 2-hydroxybenzaldehyde, 4-hydroxybenzaldehyde, 5-bromsalicylaldehyde and 2-hydroxy-1-naphthaldehyde compounds with 2,4-diamino-6-phenyl-1,3,5-triazine as amine. Oligo(phenoxy-imine)s were synthesized from Schiff bases by oxidative polycondensation in the presence of O2 oxidant in aqueous alkaline medium. The structural characterizations of Schiff bases and oligo(phenoxy-imine)s were performed by FT-IR, 1H-NMR, 13C-NMR and UV-Vis analyses. Electrochemical band gap (Eg '\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$E<^>{\prime}_{g}$$\end{document}) values of monomers and oligomers were calculated from CV measurements. The Eg '\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$E<^>{\prime}_{g}$$\end{document} values of FMD, FMB, FMM, FMF, FMN, OFMD, P-FMB, OFMM, OFMF and OFMN were calculated to be 2.80, 2.63, 2.52, 2.76, 2.12, 2.57, 2.49, 2.44, 2.51 and 2.07 eV, respectively. Limit oxygen index values of OFMD, P-FMB, OFMM, OFMF and OFMN were calculated to be 33.46%, 38.85%, 38.43%, 44.86% and 23.46%, respectively. Also, the molecular weight distributions, glass transition temperature (Tg) and surface images of oligomers were determined from GPC, DSC and SEM measurements, respectively.en_US
dc.identifier.citationKaya, İ., Cicigül, M.ve Yağmur, H. K. (2024). Synthesis and characterization of oligo(phenoxy-imine)s of Schiff bases containing phenyl-1,3,5-triazine unit: limit oxygen index values of oligomers. Polymer Bulletin, 1-25.
dc.identifier.doi10.1007/s00289-024-05559-5
dc.identifier.issn0170-0839
dc.identifier.issn1436-2449
dc.identifier.scopus2-s2.0-85208792093en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1007/s00289-024-05559-5
dc.identifier.urihttps://hdl.handle.net/11468/29801
dc.identifier.wosWOS:001352531900001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofPolymer Bulletinen_US
dc.relation.journalPolymer Bulletin
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKA_WOS_20250222
dc.subjectOligo(phenoxy-imine)sen_US
dc.subjectSchiff baseen_US
dc.subjectLimit oxygen indexen_US
dc.subjectOptical and electrochemical band gapsen_US
dc.titleSynthesis and characterization of oligo(phenoxy-imine)s of Schiff bases containing phenyl-1,3,5-triazine unit: limit oxygen index values of oligomersen_US
dc.typeArticleen_US

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