Teflon, styrene and neoprene are all

 Teflon (PTFA), Styron (Polystyrene) and Neoprene are all homopolymers.  They are formed by single monomers tetrafluoroethylene, styrene and chloroprene. Homopolymers are the polymers in which the monomers of the chain are the same. Homopolymer is a polymer that is made up of only one type of monomer unit. For example, polythene (monomer unit is ethylene), PVC ( monomer unit is vinyl chloride), etc.