The synthesis, characterization and effect of molar mass distribution on solid-state degradation kinetics of oligo(orcinol)

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dc.authoridKaya, İsmet / 0000-0002-9813-2962
dc.authoridDoğan, Fatih / 0000-0001-5844-8893
dc.contributor.authorDoğan, Fatih
dc.contributor.authorÖzdek, Naciye
dc.contributor.authorAcar Selçuki, Nursel
dc.contributor.authorKaya, İsmet
dc.date.accessioned2025-01-27T20:49:48Z
dc.date.available2025-01-27T20:49:48Z
dc.date.issued2019
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, the oxidative polymerization of orcinol monohydrate using different oxidants such as NaOCl, H2O2, and air was investigated. Polymerization studies were carried out between 50 and 90 degrees C. The optimum reaction conditions of the polymerization were also established. NaOCl was found to be the most active oxidant. The characterization of oligo(orcinol) was conducted by using FT-IR, H-1-NMR and C-13-NMR, TGA, size exclusion chromatography (SEC) and solubility techniques. At the optimum reaction conditions, the conversion to oligomer of orcinol was found to be 62% (for NaOCl oxidant), 42% (for H2O2 oxidant), and 21% (for air oxidant). According to the SEC analysis, the number-average molecular mass (M-n), mass-average molecular mass (M-w) and polydispersity index (PDI) values of oligo(orcinol) were determined to be 2260, 2540 g mol(-1), and 1.12, using NaOCl, and 2170, 2470 g mol(-1), and 1.14, using H2O2 and 1500, 1770 g mol(-1), and 1.18, using air, respectively. In addition, the relationship between molar mass distributions and activation energies of thermal degradation processes of oligo(orcinol) was investigated by using TG analysis. For this purpose, the methods based on multiple heating rates such as Flynn-Wall-Ozawa [FWO], Tang, and Kissinger-Akahira-Sunose [KAS] were used. The activation energy related to the solid-state decomposition of oligo(orcinol) synthesized with NaOCl oxidant was calculated to be 79.02 kJ mol(-1) by KAS method, 78.74 kJ mol(-1) by Tang method and 81.78 kJ mol(-1) by FWO method in the range of 0.05 < alpha < 0.95. The results obtained show that activation energy increased with an increase in molar mass.
dc.identifier.doi10.1007/s10973-019-08211-x
dc.identifier.endpage173
dc.identifier.issn1388-6150
dc.identifier.issn1588-2926
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85064267827
dc.identifier.scopusqualityQ1
dc.identifier.startpage163
dc.identifier.urihttps://doi.org/10.1007/s10973-019-08211-x
dc.identifier.urihttps://hdl.handle.net/20.500.12428/25319
dc.identifier.volume138
dc.identifier.wosWOS:000491352500015
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectOxidative polymerization
dc.subjectThermal analysis
dc.subjectNon-isothermal thermal degradation kinetics
dc.titleThe synthesis, characterization and effect of molar mass distribution on solid-state degradation kinetics of oligo(orcinol)
dc.typeArticle

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