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MADAKBAŞ, SEYFULLAH

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MADAKBAŞ

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Author: MADAKBAŞ, SEYFULLAH × Subject: Chemistry (miscellaneous) ×

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Now showing 1 - 2 of 2
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    PublicationOpen Access
    Preparation and characterization of UV‑cured epoxy acrylate‑based nanocomposite coatings containing organonanoclay
    (2022-08-01) KARATAŞ, SEVİM; MADAKBAŞ, SEYFULLAH; Turna M., Şen F., Madakbaş S., Karataş S.
    In this study, it is aimed to obtain UV-cured nanocomposite coatings. UV-curable epoxy acrylate resins were synthesized by reacting aliphatic-based epoxy resin with adipic acid and acrylic acid at certain rates and their chemical structures were characterized. The synthesized resins were reinforced with organonanoclay at diferent rates, applied as a flm to plexiglass surfaces and cured with UV rays. The thermal properties, fammability, thermomechanical properties, surface properties, morphological properties, light transmittance and durability properties of the obtained nanocomposite coatings containing organonanoclay were investigated. With 5% organonanoclyay reinforcement to the epoxy acrylate resin, the temperature of fnal mass loss increased from 521 to 557 °C, char yield increased from 0.02% to 2.95, LOI increased from 22.1 to 23.5%, contact angle increased from 56 to 74°. The results showed that UV-cured nanocomposite coatings have the properties required by the coating industry, and these properties are improved with the addition of organonanoclay. Keywords Nanocomposite · Coating · UV-cured · Epoxy acrylate · Organonanoclay
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    Thermal and dielectric properties of flexible polyimide nanocomposites with functionalized nanodiamond and silver nanoparticles
    (2023-05-01) BİRTANE, HATİCE; MADAKBAŞ, SEYFULLAH; ESMER, KADİR; KAHRAMAN, MEMET VEZİR; Birtane H., Cigil A. B., Madakbaş S., Esmer K., Kahraman M. V.
    In the present study, amine groups were first modified to diamond and silver nanoparticles using APTMS to improve their homogeneous dispersion and compatibility in polyamic acid. Flexible polyimide nanocomposite films were successfully prepared by adding modified nanodiamond and silver nanoparticles to 4,4 \"-(1,3-phenylenedioxy) dianiline and benzophenone-3,3 \",4,4 \"-tetracarboxylic dianhydrides with different proportions. The effects of added amine-modified nanoparticles on dielectric constant and thermal stability were investigated. With SEM analysis, nanoparticles were homogeneously distributed on the polyimide surface and the presence of Si atom resulting from APTMS modification is clearly seen with the SEM-EDAX results. Considering the thermal resistance, the maximum decomposition temperature of the nano particle-free PI film was found to be 501 degrees C, while the thermal decomposition temperatures of the PI nanocomposite film that contains 1% m-Ag and the PI film that contains 5% m-ND, 502 degrees C and 505 degrees C, respectively. Also, it was seen that the dielectric constants of the prepared nanocomposite films that contain m-Ag NP decrease with increasing m-Ag NP ratio, and the dielectric constants of the films that contain m-ND increase with increasing m-ND ratio.