Fluorinated ethylene propylene ko FEP copolymer ne na hexafluoropropylene da tetrafluoroethylene.Ya bambanta da PTFE (polytetrafluoroethylene) resins a cikin cewa shi ne narke-aiki ta amfani da al'ada allura gyare-gyare da dunƙule extrusion dabaru.DuPont ne ya ƙirƙira ethylene propylene Fluorinated kuma ana siyar da shi a ƙarƙashin sunan mai suna polymer FEP.Sauran sunaye sune Neollon FEP daga Daikin ko Dyneon FEP daga Dyneon/3M.
FEP yayi kama da abun da ke ciki zuwa fluoropolymers PTFE (polytetrafluoroethylene) da PFA (perfluoroalkoxy polymer resin).FEP da PFA dukkansu suna raba kaddarorin PTFE masu amfani na ƙananan juzu'i da rashin amsawa, amma suna da sauƙin tsari.FEP ya fi PTFE laushi kuma yana narkewa a 260 ° C;yana da gaskiya sosai kuma yana da juriya ga hasken rana.
Ana samar da FEP ta hanyar polymerization na kyauta na cakuda tetrafluoroethylene da hexafluoropropylene.Cakuda yana nuna son kai don ramawa ɗan ƙaramin aiki na bangaren propylene.An fara aiwatar da tsari ne da peroxydisulfate, wanda ke yin homolyzes don samar da sulfate radicals.Saboda FEP ba shi da ƙarfi sosai a kusan duk abubuwan kaushi, ana gudanar da polymerization azaman emulsion a cikin ruwa, galibi ana amfani da surfactant kamar PFOS.polymer ya ƙunshi kusan 5% na bangaren propylene.
Za a iya samun fa'idodin kwatancen tebur na PTFE akan FEP, PFA da ETFE akan gidan yanar gizon DuPont, yana jera kayan aikin injiniya, thermal, sinadaran, lantarki da kaddarorin tururi na kowanne, gefe da gefe.
Dangane da juriya na lalata, FEP ita ce kawai sauran nau'ikan fluoropolymer da ke samuwa wanda zai iya dacewa da juriyar PTFE ga caustic jamiái, saboda tsari ne mai tsaftar carbon-fluorine kuma cikakke mai haske.
A thermally, FEP ya fice daga PTFE da PFA ta hanyar samun wurin narkewa na 260 °C (500 °F), kusan digiri arba'in ƙasa da PFA kuma ƙasa da PTFE.
Ta hanyar lantarki, PTFE, FEP da PFA suna da madaukai na dielectric iri ɗaya, amma ƙarfin dielectric FEP ya wuce PFA kawai.Duk da haka, yayin da PFA yana da nau'i mai kama da PTFE, raguwar FEP ya kusan sau shida na PFA da EFTE (wanda ya sa ya zama mai jagorancin filayen lantarki marar layi).
Mechanically, FEP ya ɗan fi sauƙi fiye da PTFE.Wataƙila abin mamaki, baya jure maimaita nadawa haka ma PTFE.Hakanan yana fasalta mafi girman juzu'i na juzu'i mai ƙarfi, ya fi laushi kuma yana da ɗan ƙaramin ƙarfi fiye da PTFE da PFA.
Wani abin lura mai mahimmanci na FEP shine cewa ya fi PTFE a wasu aikace-aikacen shafi da suka shafi fallasa wanki.
Ethylene tetrafluoroethylene (ETFE), ta hanyoyi da yawa, ana iya tunanin kasancewa cikin rukuni daban-daban, saboda ainihin ƙarfin injiniyan ƙarfi ne na sauran waɗanda ke nuna abin da wataƙila za a yi la'akari da ƙarancin kaddarorin a cikin sauran fagagen idan aka kwatanta da su. PTFE, FEP da PFA.
Lokacin aikawa: Afrilu-30-2018