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    Anti-Yellowing UV-Curable hybrid coatings prepared by the Sol-Gel method on polystyrene

    Year: 2020

    Journal: Prog. Org. Coat., Volume 140, MAR

    Authors: Balbay, Senay; Acikgoz, Caglayan

    Organizations: Coordination of Scientific Research Projects (BAP) of the Bilecik Seyh Edebali University [201702.BSEU.11-02]

    Keywords: Sol-gel hybrid coating; Polystyrene; UV curable; Silica aerogel; Anti-Yellowing; THF

    This study is aimed to develop UV-curable hybrid sol-gel coating in order to improve the surface properties of polystyrene (PS) against chemical degradation problem. First, hybrid sol-gels were synthesized using TEOS, VTMS, C2H5OH, distilled water, M-1 HCl, M-1 NH4OH, TiO2 and inorganic (Al2O3, SnO2, ZrO2) and organic (Tetrahydrofuran (THF)-C4H8O) chemicals. Second, the synthesized hybrid sol-gels were coated on the surface of PS plates using an applicator and pre-treated at - 80 degrees C for 24 h and the coated plates were cured under UV light at 40 degrees C for 1 h. The original PS plates and coated PS plates were subjected to a yellowing test for 26 h. Third, colour (CM-2600d. Konica Minolta Optics Inc. Japan) and gloss (Multi Gloss 268 Plus. Konica Minolta Optics Inc. Japan) measurements, hardness (TroniC-Hildebrand Shore D), FT-IR (Perkin Elmer Spectrum 100 model FTIR spectrometer), SEM (SEM-ZEISS Supra 40 V P), TGA (TGA, Setaram Labsysevo model), AFM (AEP-Nanomap-500LS) and contact angle (KSVO CAM 200) analyses of the original and UV-cured hybrid sol gel-coated PS plates were performed before and after the yellowing test. As a result, it was observed that the surface properties of the PS plates coated with the hybrid sol-gel prepared using C4H8O organic compound of 0.5 g improved significantly.
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