Polyester is a polymer obtained from an esterification reaction between a polyacid and a polyalcohol, repeated many times.
They are used in the production of fishing rods, textile fibers, etc. Commercially, it is known as terilene or tergal.
To obtain this polymer, terephthalic acid can be reacted with ethylene glycol.
This polymer was the first to have great industrial importance.
It is chemically stable, heat resistant and has insulating property.
It was widely used in radios, telephones and electrical goods such as switches. It is obtained by the reaction between a phenol molecule and a formaldehyde molecule.