“Study of the Effect of Adding (TiO2) on Some Mechanical and Thermal Properties of Polyvinyl Chloride (PVC) Pipes Exposed to Sunlight: No”. Damascus University Journal for engineering sciences 41, no. 1 (February 27, 2025). Accessed June 18, 2026. https://journal.damascusuniversity.edu.sy/index.php/engj/article/view/7079.