PTFE vs PFA

I-PFA, okanye i-Perfluoroalkoxy, luhlobo lwe-fluoropolymer.Ineempawu ezifanayo kakhulu njenge-polytetrafluoroethylene (PTFE), eyona ndlela idume kakhulu yepolymer.I-PFA yakhawulwa yiDuPont Co. kwaye yanikwa igama lophawu lwepolymer PFA.Yintoni eyahlulayo kwii-resin ze-PTFE kukuba i-PFA iyanyibilika.Oku kufezwa ngokubunjwa kwenaliti yesiqhelo kunye ne-screw extrusion ubuchule.

I-Polytetrafluoroethylene (PTFE), ikwayi-synthetic fluoropolymer ye-tetrafluoroethylene.I-DuPont Co. ngoyena mvelisi owaziwayo we-PTFE, leyo, njengoko bekutshiwo ngaphambili, eyona nto iyaziwa ngabantu abaninzi njengepolymer.Ukwakhiwa kokufunyanwa ngengozi kwe-Roy Plunkett, i-PTFE yikhompawundi ephezulu ye-molecular-weight equlethwe yikhabhoni kunye ne-fluorine.Ngokusisiseko, sisomeleleyo se-fluorocarbon.Yi-hydrophobic, oku kuthetha ukuba amanzi okanye izinto eziqulathe amanzi zinokuwenza abe manzi ngenxa yeempawu ze-fluorocarbon zokunciphisa amandla okusasazwa eLondon.Ke ngoko, i-PTFE inomlinganiso ophantsi kakhulu wokukhuhlana xa udibana nezinto eziqinileyo.Oku kungenxa ye-electronegativity ephezulu yefluorine.Ngaphandle kwepolymer, i-PTFE ikwabizwa ngokuba yiFluon kunye neSyncolon.

i-olytetrafluoroethylene (PTFE) yi-synthetic fluoropolymer ye-tetrafluoroethylene enezicelo ezininzi.

I-Perfluoroalkoxy alkanes (PFA) yi-copolymer ye-hexafluoropropylene kunye ne-perfluoroethers.Onye ukwakhiwa kwe-PFA eyaziwayo yi-polymer PFA.

I-PFA ineepropati ezifanayo kakhulu kwi-PTFE, nangona umahluko omkhulu phakathi kwe-PTFE kunye ne-PFA kukuba i-PFA iyanyibilikiswa.Oku kufezwa ngokubunjwa kwenaliti yesiqhelo kunye ne-screw extrusion ubuchule.

I-PTFE isetyenziswa kakhulu njengento yokugquma iipani kunye nezinto ezininzi zokupheka zale mihla.I-PTFE isoloko isetyenziswa kwizikhongozeli kunye nemibhobho yokuphatha iikhemikhali ezisebenzayo nezizonakalisayo.Oku kungenxa yokuba ineempawu ezingasebenziyo.Olunye usetyenziso olusebenzayo lwe-PTFE lufana nesithambiso.Isetyenziswa ngale ndlela, i-PTFE inceda ukunciphisa ingxabano phakathi koomatshini, ukunciphisa “ukunxiba nokukrazuka,” kunye nokuphucula ukusetyenziswa kwamandla.

I-PFA iqhele ukusetyenziselwa izixhobo zelebhu zeplastiki ngenxa yokuchasa kakhulu uhlaselo lweekhemikhali, ukucaca kwamehlo, kunye nokuguquguquka ngokubanzi.I-PFA ikwahlala isetyenziswa njengetyhubhu yokuphatha iinkqubo ezibaluleke kakhulu okanye ezonakalisa kakhulu.Ezinye izicelo zePFA zifana namaphepha elinen kwizixhobo zekhemikhali.Ngenxa yeempawu zayo, inokuququzelela ukusetyenziswa kwe-carbon steel fiber reinforced plastics (FRPs) njengokutshintshwa kweealloys ezibiza kakhulu kunye neentsimbi.

Izixhobo ezisetyenziselwa umlinganiselo womgangatho zihlala zisesichengeni semozulu yetanki erhabaxa.Imithombo yeendaba enobundlongondlongo, efana ne-asidi, inokonakalisa iiprobes kunye neenxalenye ezidibana nemveliso.Iimveliso zeViscous kunye nezincangathi zeminye imingeni yomlinganiselo wenqanaba.Ezi zinokubangela ukwakhiwa kwiindawo ezimanzi ze-transmitter kwaye zonyuse umngcipheko wokuchaphazela umlinganiselo.Amalungu amanzi agqunywe kwi-PTFE okanye kwiPFA imathiriyeli anika ukuxhathisa okulungileyo kwiimveliso ezidlekayo kwaye zisisisombululo esisebenzayo sokuthintela ungcoliseko olubangelwa kukwakhiwa kwemveliso.

Iimveliso ezisekelwe emanzini zinokubangela ukuxinana kwi-eriyali, enokuchaphazela umlinganiselo womgangatho.Ngenxa yeepropathi ze-hydrophobic ze-PTFE kunye ne-PFA, umlinganiselo uya kuhlala ungathinteki kwimeko yamaconsi okwakhiwa kwamanzi kwiindawo ze-antenna.

I-PTFE, ukuba yi-fluorocarbon solid, i-hydrophobic, okuthetha ukuba ayimanziswa lula zizinto eziqulathe amanzi.Kwakhona, i-PTFE inomlinganiso ophantsi kakhulu wokukhuhlana xa udibana nezinto eziqinileyo.

I-PFA iphezulu kune-PTFE ngokwemiqathango yokuguquguquka ngakumbi xa kuziwa kwizicelo zetyhubhu.Kwelinye icala, ubomi obuguquguqukayo bePFA (oko kukuthi, amandla okunyamezela ukusongwa ngokuphindaphindiweyo) bungaphantsi kune-PTFE.

I-PTFE ixhathisa kancinci kubushushu kunePFA.I-PFA ichatshazelwa ngakumbi kukufunxa kwamanzi kunye nemozulu kodwa ingaphezulu kwe-PTFE xa isiza ekuxhathiseni isitshizi setyuwa.

I-PFA ine-dielectric engaguqukiyo efanayo ne-PTFE kunye nento efana kakhulu yokulahla;ukanti i-PFA inamandla edielectric amaxesha amathathu ukuya kwamane aphezulu kune-PTFE.