Effect of Nano SiO2 Particles on some Physical Properties of (UP/PU) Blend Composite
The effect Horse Stretch Rugs of SiO2 physical properties (Shore D hardness, impact strength, 3 pts bending, thermal conductivity, and weight gain) after and before immersion in different liquid solution (water, HCL 0.2 N , and NaOH 0.2 N), of (UP/PU) blend was studied.Hand lay-up technique was applied using unsaturated polyester and polyurethane b