المراجع ^ أ ب Payal Baheti, "How Is Plastic Made? A Simple Step-By-Step Explanation"،, Retrieved 6-4-2021.Edited. ↑ The Editors of Encyclopaedia Britannica (26-5-2020), "Polymerization"،, Retrieved 6-4-2021.Edited. ↑ "How Plastics Are Made",, Retrieved 6-4-2021.Edited. ↑ "Plastics",, Retrieved ...