Browsing by Author "BOUZMANE, Hajar"
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thesis.listelement.badge INFLUENCE OF SURFACE TREATMENTS OF FELDSPAR AND QUARTZ MINERALS TO ELASTOMERIC POLYURETHANE BASED COMPOSITES(2022-06-20) BOUZMANE, Hajar; TİRKEŞ, Seha; TAYFUN, ÜmitIn this thesis study, surface treatment routes including silane modifications were applied to quartz and feldspar minerals (purchased from Eczacıbaşı Esan, Istanbul, Türkiye) to achieve a compatible mineral surface with the polymer matrix. Surface characteristics of minerals were examined using chemical analysis and surface functionality by Fourier transformed infrared spectroscopy (FTIR) method. Thermoplastic polyurethane-TPU (supplied by Ravago Petrochemicals, Izmir, Türkiye) was compounded with pristine and modified minerals by melt-blending technique. TPU-based composites were fabricated at a constant adding amount of 10% by weight for each additive. The dogbone-shaped test samples were prepared using an injection molding process. Mechanical, thermo-mechanical, melt-flow, and morphological characterizations of TPU and composites were performed by tensile and Shore hardness tests, dynamic mechanical analysis (DMA), melt flow index (MFI) measurements, and scanning electron microscopy (SEM), respectively. Effects of surface treatments were discussed comparing the findings of composites filled with pristine and modified minerals with the help of test data.