The Effect of UV- Radiation on Mechanical and Chemical Properties of Polyurethane/ nanoTiO2 Sizing by Unsaturated Polyester

Abstract

Polyurethanefoams werefabricated with different percentages of nano titanium dioxide (TiO2) and sizing by the unsaturated polyester. In thesesamples, the (TiO2) nanoparticleswere inserted to polyurethane foams as filler with different percentages (1%, 3%, 5% and 7wt %) to study the effect ofUV radiation and (TiO2) nanoparticles onsome of mechanical properties, such as (impact resistance and bending strength) as well asthe chemical resistance in salt media.Results showed the impact resistance increased with increasing of the (TiO2) nanoparticles weight percentage until 3wt%. Moreover, the bending strength increased with rising in weight percentages of (TiO2) nanoparticles until 5wt%. The optimum sample of chemical resistance was5wt% of (TiO2) nanoparticle. Finally, the UV radiation leads to decrease of the mechanical properties. Additionally, chemical resistance was decreased with UV radiation exposure.Sample with 5wt% has the best and lowest of weight loss than other samples.