: an isomer that is a stereoisomer of a compound having two or more chiral centers and that is not a mirror image of another stereoisomer of the same compound â
A compact disc is a deceptively simple looking device considering the technology required to make it. 1  CDs consist of three layers of materials: 2  A base layer made of a polycarbonate plastic. 3  A thin layer of aluminum coating over the polycarbonate plastic. 4  A clear protective acrylic coating over the aluminum layer.
The chemical composition of plastics is different depending on what type of plastic your dealing with. But for the most part the raw material of plastic is hydrocarbons found naturally in oil. Take cellulose acetate--a very popular polymer, used mostly in thin films. It's made from cotton.Some rubbers are made from the sap of a tree.ut for the most part the raw material of plastic is hydrocarbons found naturally in oil. Take cellulose acetate--a very popular polymer, used mostly in thin films. It's made from cotton. Some rubbers are made from the sap of a tree.