Mohammed E, Nashwan M, Abdalkarim A, Al-Naqeed S, Al-Areqi NAS, Alariqi SAS. Valorization of Spent Engine Oil as a Sustainable Polyol Substituent in Flexible Polyurethane Foam Synthesis: A Comparative Study of Starch and Natural Zeolite Filler Systems. SJAS [انترنت]. 3 سبتمبر، 2026 [وثق 8 سبتمبر، 2026];9(2):33-51. موجود في: https://journal.alsaeeduni.edu.ye/index.php/SJAS/article/view/330