Hydrothermal Synthesis of Polyoxometalate Containing Cobalt Ion, and Its Polyurethane Composites for Dielectric Material Applications

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dc.contributor.authorKucuk, Ilhan
dc.contributor.authorVural, Sema
dc.contributor.authorKivilcim, Nilufer
dc.contributor.authorAdiguzel, Ibrahim
dc.contributor.authorKoytepe, Suleyman
dc.contributor.authorSeckin, Turgay
dc.date.accessioned2024-02-23T14:20:45Z
dc.date.available2024-02-23T14:20:45Z
dc.date.issued2020
dc.departmentNEÜen_US
dc.description.abstractPolyurethane (PU) composites were prepared with different diisocyanate and diol compounds by adding cobalt ion-based polyoxometalate (Co-POM) as reinforcement. For the determination of using potential in microelectronic applications, the dielectric behavior and dielectric constant of these PU composites were investigated and compared to pure polyurethane structures. For this aim, firstly, Co-POM with Keggin structure was obtained from ammonium heptamolybdate, 1,10-phenanthroline ligand and a cobalt (II) salt by hydrothermal synthesis technique. Then, polyurethane/Co-POM composites (PU/Co-POM) were prepared with ethylene glycol, nonaromatic diisocyanate and different amounts of Co-POM reinforcement (1%, 3%, 5% and 10%, w/w) by in situ polymerization and mix-blend technique. Obtained PU/Co-POM composites were characterized in detail by infrared spectroscopy, Elemental Mapping, Energy-dispersive X-ray spectroscopy (EDX) and X-ray powder diffraction (XRD) spectroscopy. The surface structure, morphology and roughness of PU/Co-POM composites were investigated by SEM and AFM analysis. The elemental maps of the PU/Co-POM surface were examined by EDX elemental mapping analysis methods. Thermal stability, Tg values and thermal decomposition temperatures of PU/Co-POM structures were determined by different thermal analysis techniques. Thermal analysis results showed that the PU/Co-POM composites are thermally stable up to approximately 200 degrees C and Tg values of synthesized PU composites are seen between 54.72 degrees C and 75.15 degrees C. The dielectric properties and dielectric constants of the PU/Co-POM composites were determined in the frequency range 1 Hz to 1000 kHz at room temperature using impedance analyzer. Dielectric constants of these composites were ranged from 5.50 to 9.26 according to their polarizability and H-bonding ability of PU matrix structure. According to the dielectric measurements, the dielectric constants of the PU/Co-POM structures were significantly decreased compared to the pure PU structures.en_US
dc.description.sponsorshipInonu University Scientific Research Projects Unit [BAP-2013/44]en_US
dc.description.sponsorshipThis study was supported financially by the Inonu University Scientific Research Projects Unit with project [BAP-2013/44].en_US
dc.identifier.doi10.1080/25740881.2020.1768543
dc.identifier.endpage1841en_US
dc.identifier.issn2574-0881
dc.identifier.issn2574-089X
dc.identifier.issue16en_US
dc.identifier.scopus2-s2.0-85086319027en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage1822en_US
dc.identifier.urihttps://doi.org/10.1080/25740881.2020.1768543
dc.identifier.urihttps://hdl.handle.net/20.500.12452/13296
dc.identifier.volume59en_US
dc.identifier.wosWOS:000543408300001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofPolymer-Plastics Technology And Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDielectric Materialen_US
dc.subjectPolyoxometalate Compositesen_US
dc.subjectPolyurethane Compositesen_US
dc.titleHydrothermal Synthesis of Polyoxometalate Containing Cobalt Ion, and Its Polyurethane Composites for Dielectric Material Applicationsen_US
dc.typeArticleen_US

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