PFA yog dab tsi?

Perfluoroalkoxy alkanes lossis PFA yog fluoropolymers . Lawv yog cov copolymers ntawm tetrafluoroethylene (CF) thiab perfluoroethers (CFORf, qhov twg Rf yog ib pawg perfluorinated xws li trifluoromethyl (CF)). Nyob rau hauv cov nqe lus ntawm lawv cov khoom, cov polymers yog zoo li polytetrafluoroethylene (PTFE). Qhov sib txawv loj yog tias cov alkoxy substituents cia tus polymer yuav tsum yaj ua tiav. Hauv qib molecular, PFA muaj lub sijhawm me me, thiab ntau dua cov khoom nkag siab dua lwm cov fluoropolymers. Nws kuj muaj cov pa roj carbon atom ntawm cov ceg ntoo. Qhov no tshwm sim hauv cov khoom uas txhais tau ntau dua thiab tau nce kev khiav dej khov, Ua kom tsis muaj zog, thiab thermal stability ze los yog dhau PTFE. Zoo sib xws ntawm cov khoom ua tau pom muaj nyob rau hauv cov tshuaj fluorinated ethylene propylene (FEP), lub tshuab luam ntawv ntawm tetrafluoroethylene thiab hexafluoropropylene .