I-PTFE vs PFA

I-PFA, noma i-Perfluoroalkoxy, iwuhlobo lwe-fluoropolymer.Inezici ezifanayo kakhulu njenge-polytetrafluoroethylene (PTFE), okuwuhlobo oludume kakhulu lwe-polymer.I-PFA yaqanjwa yi-DuPont Co. futhi yanikezwa igama lomkhiqizo we-polymer PFA.Okuyihlukanisa nezinhlaka ze-PTFE ukuthi i-PFA iyancibilika iyacutshungulwa.Lokhu kufezwa ngokubumba okujwayelekile komjovo kanye namasu okukhipha izikulufu.

I-Polytetrafluoroethylene (PTFE), futhi iyi-fluoropolymer yokwenziwa ye-tetrafluoroethylene.I-DuPont Co. ingumkhiqizi owaziwa kakhulu we-PTFE, njengoba kushiwo ngaphambili, into abantu abaningi abayaziyo njenge-polymer.Yakha kusukela ekutholweni kwengozi kuka-Roy Plunkett, i-PTFE iyinhlanganisela yesisindo samangqamuzana aphezulu ehlanganiswe ne-carbon ne-fluorine.Eqinisweni, i-fluorocarbon solid.I-hydrophobic, okusho ukuthi amanzi noma izinto eziqukethe amanzi zingawenza abe manzi ngenxa yesici se-fluorocarbon sokunciphisa amandla okuhlakazeka kwe-London.Ngakho, i-PTFE ine-coefficient ephansi kakhulu yokungqubuzana lapho ithinta okuqinile.Lokhu kungenxa ye-electronegativity ephezulu ye-fluorine.Ngaphandle kwe-polymer, i-PTFE ibizwa nangokuthi i-Fluon ne-Syncolon.

I-olytetrafluoroethylene (PTFE) iyi-fluoropolymer yokwenziwa ye-tetrafluoroethylene enezinhlelo eziningi zokusebenza.

I-Perfluoroalkoxy alkanes (PFA) iyi-copolymer ye-hexafluoropropylene kanye ne-perfluoroethers.Ukwakheka kwe-PFA okuvame ukwaziwa i-polymer PFA.

I-PFA inezinto ezifanayo kakhulu ne-PTFE, nakuba umehluko omkhulu phakathi kwe-PTFE ne-PFA ukuthi i-PFA iyacutshungulwa.Lokhu kufezwa ngokubumba okujwayelekile komjovo kanye namasu okukhipha izikulufu.

I-PTFE isetshenziswa kakhulu njengento yokumboza amapani nezinto eziningi zanamuhla zezitsha zokupheka.I-PTFE ivamise ukusetshenziswa ezitsheni nasemapayipini okuphatha amakhemikhali asebenzayo futhi abolayo.Lokhu kungenxa yokuthi inezinto ezingasasebenzi.Olunye uhlelo olusebenzayo lwe-PTFE lufana ne-lubricant.Isetshenziswa ngale ndlela, i-PTFE isiza ukunciphisa ukungqubuzana phakathi kwemishini, inciphise “ukuguga,” futhi ithuthukise ukusetshenziswa kwamandla.

I-PFA imvamisa isetshenziselwa imishini yelebhu yepulasitiki ngenxa yokumelana kwayo ngokwedlulele nokuhlaselwa kwamakhemikhali, ukubonakala kwe-optical, kanye nokuguquguquka okuphelele.I-PFA iphinde isetshenziswe njengeshubhu ekuphatheni izinqubo ezibucayi noma ezonakalisa kakhulu.Ezinye izicelo ze-PFA zifana namashidi emishini yamakhemikhali.Ngenxa yezakhiwo zayo, ingenza kube lula ukusetshenziswa kwe-carbon steel fibre reinforced plastics (FRPs) njengokungena esikhundleni sama-alloys nezinsimbi ezibiza kakhulu.

Amadivayisi asetshenziselwa ukulinganisa izinga avamise ukuchayeka emimoyeni yamathangi anokhahlo.Imithombo yezindaba enolaka, njenge-asidi, ingagqwalisa ama-probe kanye nezingxenye ezixhumene nomkhiqizo.Imikhiqizo ye-viscous nenamathelayo ezinye izinselele zokulinganisa izinga.Lokhu kungabangela ukunqwabelana ezingxenyeni ezimanzi ze-transmitter futhi kwandise ingozi yokuba nomthelela esilinganisweni.Izingxenye ezimanzi ezimbozwe ngezinto ze-PTFE noma ze-PFA zinikeza ukumelana okuhle nemikhiqizo ebolayo futhi ziyisixazululo esisebenzayo sokugwema ukungcoliswa okubangelwa ukwakheka komkhiqizo.

Imikhiqizo esekwe emanzini ingabangela ukujiya kothi, okungase kuthinte ukukalwa kwezinga.Ngenxa yezakhiwo ze-hydrophobic ze-PTFE ne-PFA, ukulinganisa kuzohlala kungathinteki uma kwenzeka amaconsi anqwabelana ezingxenyeni ze-antenna.

I-PTFE, okuyi-fluorocarbon solid, i-hydrophobic, okusho ukuthi ayimanziswa kalula izinto eziqukethe amanzi.Futhi, i-PTFE ine-coefficient ephansi kakhulu yokungqubuzana lapho ithinta okuqinile.

I-PFA iphakeme kune-PTFE ngokwemibandela yokuguquguquka ikakhulukazi uma kuziwa ekufakweni kwamashubhu.Ngakolunye uhlangothi, impilo eguquguqukayo ye-PFA (okungukuthi, amandla okubekezelela ukugoqa okuphindaphindiwe) iphansi kune-PTFE.

I-PTFE imelana kancane nokushisa kune-PFA.I-PFA ithintwa kakhulu ukumuncwa kwamanzi kanye nesimo sezulu kodwa iphakeme kune-PTFE uma kuziwa ekuphikiseni ukufuthwa kukasawoti.

I-PFA ine-dielectric engaguquki njenge-PTFE kanye nesici sokulahla esifana kakhulu;nokho i-PFA inamandla e-dielectric izikhathi ezintathu kuya kwezine ngaphezu kwe-PTFE.