PFA, ko Perfluoroalkoxy, nau'in fluoropolymer ne.Yana da kaddarorin kama da na polytetrafluoroethylene (PTFE), wanda shine sanannen nau'in polymer.DuPont Co. ya ɗauki cikinsa PFA kuma an ba shi sunan alamar polymer PFA.Abin da ya bambanta shi daga resins na PTFE shine cewa PFA yana narkewa.Ana samun wannan ta hanyar gyare-gyaren allura na al'ada da kuma dabarun dunƙule extrusion.
Polytetrafluoroethylene (PTFE), kuma wani roba fluoropolymer na tetrafluoroethylene.DuPont Co. shine mafi sanannun mai samar da PTFE, wanda, kamar yadda aka ambata a baya, shine kayan da yawancin mutane suka sani a matsayin polymer.Gina daga binciken da aka yi na Roy Plunkett na bazata, PTFE wani fili ne mai nauyin kwayoyin halitta wanda ya ƙunshi carbon da fluorine.Ainihin, yana da ƙarfi na fluorocarbon.Yana da hydrophobic, ma'ana ruwa ko abubuwan da ke ɗauke da ruwa na iya jika shi saboda halayen fluorocarbon na rage ƙarfin tarwatsawar London.Don haka, PTFE yana da ƙarancin juzu'i yayin hulɗa da daskararru.Wannan shi ne saboda yawan electronegativity na fluorine.Banda polymer, PTFE kuma ana kiransa Fluon da Syncolon.
olytetrafluoroethylene (PTFE) wani nau'in fluoropolymer na roba ne na tetrafluoroethylene wanda ke da aikace-aikace masu yawa.
Perfluoroalkoxy alkanes (PFA) copolymer ne na hexafluoropropylene da perfluoroethers. Ɗayan da aka fi sani da tsarin PFA shine polymer PFA.
PFA yana da kaddarorin kama da PTFE, kodayake babban bambanci tsakanin PTFE da PFA shine ana sarrafa PFA.Ana samun wannan ta hanyar gyare-gyaren allura na al'ada da kuma dabarun dunƙule extrusion.
Ana amfani da PTFE da yawa azaman abin rufe fuska mara sanda don kwanon rufi da yawancin kayan girki na zamani.Ana amfani da PTFE sau da yawa a cikin kwantena da bututu don sarrafa sinadarai masu raɗaɗi da lalata.Wannan saboda yana da kaddarorin da ba sa amsawa.Wani aikace-aikacen aikace-aikacen PTFE shine azaman mai mai.Ana amfani da ita ta wannan hanyar, PTFE yana taimakawa wajen rage juzu'i a cikin injina, rage girman "sawa da tsagewa," da haɓaka yawan kuzari.
Ana amfani da PFA gabaɗaya don kayan aikin dakin gwaje-gwaje na filastik saboda matsanancin juriya ga harin sinadarai, bayyananniyar gani, da sassauci gabaɗaya.Hakanan ana amfani da PFA akai-akai azaman tubing don ɗaukar matakai masu mahimmanci ko lalata sosai.Sauran aikace-aikace na PFA sune azaman lilin takarda don kayan aikin sinadarai.Saboda kaddarorinsa, yana iya sauƙaƙe amfani da robobin ƙarfafa fiber na carbon karfe (FRPs) a matsayin maye gurbin gami da karafa masu tsada.
Na'urorin da aka yi amfani da su don auna matakin yawanci ana fallasa su zuwa yanayin tanki mai tsauri.Kafofin watsa labarai masu tsauri, kamar acid, na iya lalata bincike da sassa a cikin hulɗa da samfurin.Kayayyakin viscous da m wasu ƙalubale ne na auna matakin.Wadannan na iya haifar da haɓakawa akan sassan da aka jika na watsawa kuma suna ƙara haɗarin yin tasiri ga ma'aunin.Abubuwan da aka jika da aka rufa a cikin kayan PTFE ko PFA suna ba da kyakkyawar juriya ga samfuran lalata kuma suna da tasiri mai inganci don guje wa gurɓataccen gurɓataccen samfur.
Samfuran tushen ruwa na iya haifar da kumburin eriya, wanda zai iya shafar ma'aunin matakin.Sakamakon kaddarorin hydrophobic na PTFE da PFA, ma'aunin zai kasance ba zai taɓa faruwa ba idan ɗigon ruwa ya taru akan sassan eriya.
PTFE, kasancewa mai ƙarfi na fluorocarbon, shi ne hydrophobic, ma'ana cewa ba shi da sauƙi a jika ta abubuwan da ke ɗauke da ruwa.Hakanan, PTFE yana da ƙarancin juzu'i yayin hulɗa da daskararru.
PFA ya fi PTFE ta fuskar sassauci musamman idan ya zo ga aikace-aikacen tubing.A gefe guda, rayuwar sassaucin ra'ayi na PFA (watau iyawar jure maimaita nadawa) ya yi ƙasa da PTFE.
PTFE yana da ɗan juriya ga zafi fiye da PFA.PFA ya fi shafar sha ruwa da yanayin yanayi amma ya fi PTFE idan ya zo ga juriya na feshin gishiri.
PFA yana da nau'in dielectric iri ɗaya kamar PTFE da kuma nau'in rarrabawa iri ɗaya;duk da haka PFA yana da ƙarfin dielectric sau uku zuwa hudu fiye da PTFE.
Lokacin aikawa: Nov-10-2020