Cholesterol functionalized linear Poly(ε-caprolactone) polymers: Effects of chain length on mesomorphic and dielectric properties

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dc.contributor.authorDoganci, Merve Dandan
dc.contributor.authorDavarci, Derya
dc.contributor.authorUner, Melek
dc.contributor.authorDemir, Ahmet
dc.contributor.authorMusatat, Ahmad Badreddin
dc.contributor.authorAkdogan, Mustafa
dc.contributor.authorDoganci, Erdinc
dc.date.accessioned2025-10-11T20:48:32Z
dc.date.available2025-10-11T20:48:32Z
dc.date.issued2025
dc.departmentDüzce Üniversitesien_US
dc.description.abstractCholesterol-functionalized linear poly (epsilon-caprolactone) (Chol-PCL) polymers with different chain lengths (n = 10, 20, 30, and 70) were successfully synthesized via a ring-opening polymerization reaction using cholesterol as initiator. Their structures were confirmed by 1H NMR and FT-IR spectroscopy, and their various dielectric properties were extensively investigated in a frequency range from 100 Hz to 1 MHz under different voltage conditions (0-20 V). The results revealed that all the obtained polymers have focal conic fan shape textures of the smectic phase, encouraging the mesomorphism. In particular, Chol-PCL30 showed superior dielectric performance and exhibited the highest capacitance values and optimal dielectric stability over the measured frequency spectrum. The study showed a non-linear relationship between the chain length of PCL and dielectric properties, with the medium chain length (n = 30) providing the most favorable molecular architecture for enhanced charge capability and dielectric response. Complex impedance analysis revealed a pronounced relaxation behavior as a function of chain length, with Chol-PCL30 showing the most pronounced impedance response. These results provide valuable insights into the structure-property relationships in cholesterol-modified PCL systems and their potential applications in dielectric materials. To address the limitations of existing dielectric materials and explore novel polymeric systems with enhanced electrical properties, cholesterol-functionalized linear poly (epsilon-caprolactone) (Chol-PCL) polymers were successfully synthesized with precisely controlled chain lengths (n = 10, 20, 30, and 70) via ring-opening polymerization using cholesterol as an initiator. Structural confirmation was achieved through 1H NMR and FT-IR spectroscopy. A comprehensive investigation into their dielectric properties, including capacitance, conductance, dielectric constant, dissipation factor, electrical modulus, and impedance, was conducted across a broad frequency range (100 Hz-1 MHz) under varying voltage conditions (0-20 V). All synthesized polymers exhibited focal conic fan shape textures characteristic of the smectic phase, indicating their mesomorphic nature. Notably, Chol-PCL30 demonstrated exceptional dielectric performance, exhibiting the highest capacitance values and notable dielectric stability across the measured frequency spectrum. This study revealed a significant non-linear correlation between the PCL chain length and the observed dielectric properties, with the medium chain length (n = 30) providing an optimal molecular architecture for enhanced charge storage capability and dielectric response. Furthermore, complex impedance analysis elucidated a pronounced relaxation behavior that was highly dependent on chain length, with Chol-PCL30 exhibiting the most significant impedance response. These findings offer crucial insights into the intricate structure-property relationships within cholesterol-modified PCL systems, paving the way for their potential application in advanced dielectric materials.en_US
dc.description.sponsorshipKocaeli University Scientific Research Projects Coordination Unit [FHD-2023-3476]en_US
dc.description.sponsorshipThis work has been supported by Kocaeli University Scientific Research Projects Coordination Unit under grant number FHD-2023-3476.en_US
dc.identifier.doi10.1016/j.matchemphys.2025.131363
dc.identifier.issn0254-0584
dc.identifier.issn1879-3312
dc.identifier.scopus2-s2.0-105012354699en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.matchemphys.2025.131363
dc.identifier.urihttps://hdl.handle.net/20.500.12684/21953
dc.identifier.volume346en_US
dc.identifier.wosWOS:001548229700003en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofMaterials Chemistryand Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzKA_WOS_20250911
dc.subjectLiquid crystalen_US
dc.subjectCholesterolen_US
dc.subjectRing-opening polymerizationen_US
dc.subjectpoly(epsilon-caprolactone)en_US
dc.titleCholesterol functionalized linear Poly(ε-caprolactone) polymers: Effects of chain length on mesomorphic and dielectric propertiesen_US
dc.typeArticleen_US

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