Fluoropolymers propylene Perfluoroalkoxy

Ethylene Tetrafluoroethylene Copolymer (ETFE) Fluorinated Ethylene Propylene Copolymer (FEP) Fluoropolymer Fluoropolymer, CTFE Perfluoroalkoxy Polymer (PFA)... 

Fluoropolymers discussed include polytetrafluoro-ethylene (PTFE), perfluoroalkoxy polymer (PFA), fluorinated ethylene-propylene polymer (FEP), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlorotrifluoroethylene copolymer (ECTFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), and polyvinyl fluoride (PVF). 

Figure 3.1 Evolution of fluoropolymer development over time. PCTFE, Polychlorotrifluoroethylene PVDF, poly-vinylidene fluoride PVF, polyvinyl fluoride FEP, fluorinated ethylene propylene copolymer ECTFE, ethylene-chlorotrifluoroethylene copolymer ETFE, ethylene-tetrafluoroethylene copolymer PFA, perfluoroalkoxy copolymer AF, amorphous fluoropolymer.

One of the disadvantages of PTIE is that it is not melt processable. In 1960 DuPont introduced fluorinated ethylene propylene (FEP), which was chiefly designed to provide melt processability. In 1972 DuPont introduced another fully fluorinated polymer, perfluoroalkoxy (PEA), which is also melt processable, with better melt flow and molding properties than FEP. Although PEA has somewhat better physical and mechanical properties than FEP above 3000°F (1490°C), it lacks the physical strength of PTFE at elevated temperatures and must be reinforced or designed with thickness to compensate for its softness. The heat deflechon temperature of PFA is the lowest of all fluoropolymers. PFA is used to make tubing products. 

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