FluoroplasticsCommonly known as the plastic king, its trade name is Teflon, which is a polymer of tetrafluoroethylene and is a white or off-white substance. It is prepared by polymerizing chloroform with hydrofluoric acid under high pressure to produce tetrafluoroethylene (powder), and the obtained tetrafluoroethylene powder is molded and sintered at 370 ° C. to produce a tough, non-thermoplastic and non-plastic porous resin. Although polytetrafluoroethylene is mostly crystalline, it has no melting point.

 FluoroplasticsThe plasticity increases with the increase of temperature, while the mechanical properties decrease sharply. And when it is higher than 327°C, it becomes an amorphous gel that does not flow. Above 400°C, PTFE decomposes and emits toxic volatile fluoride gases. Its low temperature performance is also very good, and it can still maintain its toughness when the temperature is lower than -80 ℃.

 FluoroplasticsIt is a paraffin polymer in which part or all of the hydrogen is replaced by fluorine. There are perfluoro (ethylene propylene)(FEP) copolymer, polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFF), polyperfluoroalkoxy (PFA) resin, ethylene-tetrafluoroethylene (ETFE) copolymer, ethylene-chlorotrifluoroethylene copolymer (ECTFE), polyvinylidene fluoride (PVDF) and polyvinyl chloride (PVF).