PE = Polyethylene: Polyethylene is a thermoplastic used in a wide variety of products. It takes its name from ethylene in monomer form, and polyethylene is produced using ethylene. In the plastics industry, its name is generally used as PE for short. The ethylene molecule C2H4 actually consists of two CH2s connected by a double bond. (CH2=CH2) Polyethylene is produced by polymerization of ethylene. The polymerization method can be radical polymerization, anionic polymerization, ion coordination polymerization and cationic polymerization methods. Each of these methods provides different types of polyethylene production.