الفهرس 
Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
The present study can be divided into three basic sections. First, preparation and structural properties of poly(MMA-co-GMA) designated as P(MMA-co-GMA) and silver nanoparticles (Ag-NPs) in which P(MMA-co-GMA)/Ag nanocomposites were prepared via in-situ polymerization with different concentrations of Ag. The fabricated P(MMA-co-GMA)/Ag nanocomposites were investigated by XRD, SEM, FT-IR spectroscopy as well as the mechanical testing. Second, preparation and structural properties of P(MMA-co-GMA) and titanium dioxide (TiO2) nanoparticles in which P(MMA-co-GMA)/TiO2 nanocomposites were prepared via in-situ polymerization with different concentrations of TiO2 nanoparticles. The fabricated P(MMA-co-GMA)/TiO2 nanocomposites were investigated by XRD, SEM, FT-IR spectroscopy as well as the mechanical testing. The XRD and FT-IR spectra results confirmed the successful formation of P(MMA-co-GMA)/Ag and P(MMA-co-GMA)/TiO2 nanocomposites with Ag and TiO2 in the nano-form. Furthermore, SEM indicated that Ag-NPs and TiO2-NPs have well dispersion within the polymer matrix. Moreover, the prepared nanocomposites displayed good enhancement in the thermal stability on adding Ag-NPs and TiO2-NPs during the corresponding polymerization. Additionally, the antimicrobial activity of P(MMA-co-GMA)/Ag and P(MMA-co-GMA)/TiO2 nanocomposites was investigated separately against Staphylococcus aureus, Escherichia coli, Candida albicans and Aspergillus niger as representatives for gram positive, gram negative bacteria, yeast and fungi. Thus, P(MMA-co-GMA)/Ag and P(MMA-co-GMA)/TiO2 nanocomposites were concluded as good candidates for biomedical applications. Third, preparation and characterization of P(MMA-co-GMA)/SiO2 nanocomposites as well as SiO2-NPs, P(MMA-co-GMA)/SiO2 nanocomposites were prepared via in-situ polymerization with different concentrations of SiO2 nanoparticles. The fabricated P(MMA-co-GMA)/SiO2 nanocomposites were investigated by XRD, SEM, FT-IR spectroscopy as well as the mechanical testing. The XRD and FT-IR spectra results confirmed the formation of P(MMA-co-GMA)/SiO2 nanocomposites with SiO2 in the nano-form. Furthermore, SEM indicated well dispersion of SiO2-NPs within the polymer matrix. Moreover, the prepared nanocomposites displayed enhancement in the thermal stability after addition of SiO2-NPs during the polymerization process.