Many individuals suffer from myopia or hyperopia and astigmatism owing to the refractive defects of eye optics because use inappropriate contact lenses. This study dealt with three polymers Poly(methyl methacrylate) (PMMA), Poly(Hydroxyl (PHEMA), Poly(glycidyl (PGMA) doping them TiO2 nanoparticles evaluate difference between effect each lens on human eye. The NPs were prepared in this work by s...

Background:Chitosan and Calcium are one of the natural polymeric materials obtained from the exoskeleton of Xylotrupes gideon through demineralization, deproteinization and deacetylation processes. Nano chitosan and calcium can inhibit the demineralization process, which is caused by the consumption of acetic acid. This study aims to determine the effect of nano chitosan pretreatment and ...

Macromolecular or polymeric liquids consist of polymer solutions, polymer melts, particle suspension fluids, and many biological fluids. Polymer solutions are made of polymers dissolved in solutions or solvent; polymer melts are molten polymers; particle suspension fluids consist of solid particles suspended in a matrix fluid which may be a viscous or viscoelastic fluid, blood flows consist of ...

Indentation hardness and scratch tests are common techniques used in industries laboratories to determine the mechanical properties of thin films. Here, we propose a relative value elastic modulus films composed mixture polydimethylsiloxane polymeric silica with self-healing effects. For this study, homemade nano-indenter nano tester have been designed microscope scanning stage allowing carryin...

Polymeric nanocomposites are an emerging research topic, as they improve fiber-reinforced composites’ thermo-mechanical and tribological properties. Nanomaterials electrical thermal conductivity provide excellent wear friction resistance to the polymer matrix material. In this work, a systematic study was carried out examine tensile hardness properties of carbon fiber epoxy composite comprising...