Khalaf M. Effect of Alkali Lignin on Heat of Fusion, Crystallinity and melting points of Low density polyethylene(LDPE), Meduim density polyethylene(MDPE) and High density polyethylene(HDPE). UTJsci. 2010;2(2):89-95. Accessed April 7, 2025. http://mail.jsci.utq.edu.iq/index.php/main/article/view/354