Composition of Plastic
What is plastic made out of and how is it made?
The things that go into plastics are various products from
oil refineries (hydrocarbons) and some other elements, most often
chlorine (which is made from salt). Plastics are generally made
through a polymerization process, where small molecules are made
through a series of reactions, and then those small molecules
are combined (through heat or pressure) so that they all join
up forming a stable solid material. There are lots of different
varieties though, which makes recycling plastics rather difficult!
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Update: June 2012