What is polyethylene?
Plastic is a material made up of polymer. Molecules of ethene can polymerize with each other under the right conditions to form the polymer called polyethylene. Polyethylene can have different properties depending on the length of the polymer chains and on how efficiently they pack together. Some common products made from different forms of polyethylene include plastic bottles, plastic bags, and harder plastic objects such as milk crates. Several other kinds of unsaturated monomers can be polymerized and are components in common household products. Polypropylene is stiffer than polyethylene is in plastic utensils and some other types of containers.