Effect of Mixing Ratio and the Addition Ration of Magnesium Oxide on the Properties of The Rigid Polyurethane Foam in Open Medium. (2025). Latakia University (formerly Tishreen) Journal for Research and Scientific Studies - Engineering Sciences Series, 47(5), 115-126. https://journal.latakia-univ.edu.sy/index.php/engsc/article/view/20267