Fluorinated ethylene propylene kana FEP icopolymer yehexafluoropropylene uye tetrafluoroethylene.Iyo yakasiyana nePTFE (polytetrafluoroethylene) resins pakuti inonyunguduka-inogadziriswa uchishandisa yakajairwa jekiseni molding uye screw extrusion maitiro.Fluorinated ethylene propylene yakagadzirwa neDuPont uye inotengeswa pasi pezita rezita repolymer FEP.Mamwe mazita emhando ndiNeoflon FEP kubva kuDaikin kana Dyneon FEP kubva kuDyneon/3M.
FEP yakafanana zvakanyanya mukuumbwa kune fluoropolymers PTFE (polytetrafluoroethylene) uye PFA (perfluoroalkoxy polymer resin).FEP nePFA zvese zvinogovana PTFE's inobatsira zvivakwa zvepasi kukweshana uye kusa-reactivity, asi zviri nyore kuumbwa.FEP yakapfava kupfuura PTFE uye inonyunguduka pa260 °C;yakajeka uye inoshingirira kuchiedza chezuva.
FEP inogadzirwa nemahara-radical polymerization yemusanganiswa wetetrafluoroethylene uye hexafluoropropylene.Iko kusanganiswa kunorerekera kutsiva iyo yakaderera reactivity yechikamu chepropylene.Maitiro acho anowanzo kutangwa ne peroxydisulfate, iyo homolyzes kugadzira sulfate radicals.Nekuti FEP haina kunyungudika munenge mune zvese zvinonyungudutsa, iyo polymerization inoitwa semulsion mumvura, kazhinji uchishandisa surfactant sePFOS.Iyo polymer ine inenge 5% yechikamu chepropylene.
Anobatsira ekuenzanisa matafura ePTFE achipesana neFEP, PFA uye ETFE anogona kuwanikwa paDuPont's webhusaiti, achinyora ma mechanika, zvinopisa, kemikari, magetsi uye mhute zvimiro zvechimwe nechimwe, padivi nepadivi.
Panyaya yekushorwa nekuora, FEP ndiyo imwe chete inowanikwa zviri nyore fluoropolymer inogona kuenderana nePTFE yekupikisa kune caustic agents, sezvo iri pure carbon-fluorine chimiro uye yakazara fluorinated.
Nekupisa, FEP inomira kunze kubva kuPTFE nePFA nekuve nenzvimbo yekunyungudika ye260 ° C (500 ° F), inosvika makumi mana madhigirii yakaderera pane PFA uye yakaderera zvakare pane PTFE.
Zvemagetsi, PTFE, FEP nePFA zvine dielectric constants, asi FEP's dielectric simba rinongopfuurwa nePFA.Zvakadaro, nepo PFA iine chinhu chakafanana chekuparadza kuPTFE, kuparara kweFEP kwakapetwa katanhatu kune PFA neEFTE (ichiita kuti ive isina-mutsara conductor yemagetsi emagetsi).
Mechanically, FEP inoshanduka zvishoma pane PTFE.Zvichida zvinoshamisa, hazvimirire kudzokorora kupeta pamwe nePTFE.Iyo inoratidzirawo yakakwira coefficient ye dynamic friction, yakapfava uye ine zvishoma yakaderera tensile simba pane PTFE uye PFA.
Chinhu chakakosha cheFEP ndechekuti yakakura zvakanyanya kune PTFE mune mamwe maapplication ekuputira anosanganisira kuratidzwa kune zvekugezesa.
Ethylene tetrafluoroethylene (ETFE), nenzira dzakawanda, inogona kufungidzirwa seyeboka rakasiyana, sezvo iri iyo yakakwira simba reinjiniya shanduro yemamwe ane izvo zvinogona kunzi zvakadzikiswa zvishoma mune mamwe minda kana zvichienzaniswa ne PTFE, FEP uye PFA.
Nguva yekutumira: Kubvumbi-30-2018