Teflon is the trade name for Polytetrafluoroethylene (PTFE). Polymers are large molecules made up of repeating structural units called monomers. In the case of PTFE, the monomer is tetrafluoroethylene, which has the chemical formula CF₂=CF₂. Polymerization involves linking many tetrafluoroethylene molecules together to form the long PTFE chain - (CF₂-CF₂)-n.