Polimer-zeolit gaz ayırım membranlarının performansına uyumlaştırıcıların etkisi

Numerical modeling and analyses of anisotropic diffusion and stresses in polymer electrolyte fuel cell Mehrtash, Mehdi; Tarı, İlker; Department of Mechanical Engineering (2017) A two dimensional, half-cell, non-isothermal, multi-phase model of a polymer electrolyte fuel cell (PEFC) is developed. The model accounts for the acting clamping force on the cell with accompanying effects on gas transport properties and contact resistances. Spatial variations of anisotropic structural and physical properties of gas diffusion layers (GDLs) in both in-plane and through-plane directions are considered. The developed mechanistic model is validated by comparıng its results with the experimenta...
Polymer blend based mixed matrix gas separation membranes Karğılı, Melis; Yılmaz, Levent; Kalıpçılar, Halil; Department of Polymer Science and Technology (2015) Polymer blending and mixed matrix membranes are two methods suggested to improve performance of gas separation membranes. Dense and asymmetric membranes of PES/PI blends with different compositions were prepared and the effect of blend composition on gas separation performances was investigated. In addition, PES/PI/ZIF-8 blend based mixed matrix membranes were prepared in order to investigate the effect of nano-porous filler addition to polymer blends. ZIF-8 particles with size of 83 nm were synthesized. Pa...
Experimental investagation of drag reduction effects of polymer additives on turbulent pipe flow Zeybek, Şerife; Uludağ, Yusuf; Department of Chemical Engineering (2005) Since the discovery of the drag reduction effects of even small amount of macromolecules in solutions in turbulent pipe flows, there have been many experimental and theoretical studies in order to understand mechanisms behind this phenomenon. Theories have been proposed based on the observations on the change in the characteristics of the turbulent flow near the pipe wall where friction of the momentum transfer between the flow and the conduit takes place. In this study drag reduction in fully developed tur...
Flame retardancy of polymer nanocomposites Işıtman, Nihat Ali; Kaynak, Cevdet; Department of Metallurgical and Materials Engineering (2012) This thesis is aimed to understand the role of nanofiller type, nanofiller dispersion, nanofiller geometry, and, presence of reinforcing fibers in flame retardancy of polymer nanocomposites. For this purpose, montmorillonite nanoclays, multi-walled carbon nanotubes, halloysite clay nanotubes and silica nanoparticles were used as nanofillers in polymeric matrices of poly (methyl methacrylate) (PMMA), high-impact polystyrene (HIPS), polylactide (PLA) and polyamide-6 (PA6) containing certain conventional flame...
Effect of polymer additives on the physical properties of bitumen based composites Doğan, Mehmet; Bayramlı, Erdal; Department of Polymer Science and Technology (2006) Polymer modified bitumen is a binder obtained by the incorporation of various types of polymers in bitumen using mechanical mixing or chemical reactions. There are several factors affecting the properties of polymer modified bituminous composites such as; chemical composition of bitumen, kind of polymer and filler, compatibility of bitumen and polymer, amount of bitumen, polymer and filler, particle size of filler and process conditions. The main objective of this study is to determine the effects of polyme...

Citation Formats

D. Şen, H. Kalıpçılar, and L. Yılmaz, “Polimer-zeolit gaz ayırım membranlarının performansına uyumlaştırıcıların etkisi,” 2007. Accessed: 00, 2020. [Online]. Available: https://app.trdizin.gov.tr/publication/project/detail/TnpBek1qST0.