I-Polytetrafluoroethylene (PTFE) yinto yokwenziwa eyasungulwa ngephutha ngasekupheleni kwawo-1930 ngenkathi usokhemisi ezama ukwakha uhlobo olusha lwesiqandisi esisekelwe ku-perfluorethylene.Kunokuba athole i-chlorofluorocarbon, usosayensi wamangala ukuthola ukuthi i-perfluorethylene esetshenziswe kule nqubo isabela ngokuqukethwe kwensimbi esitsheni sayo futhi yenziwa i-polymer ngaphansi kwengcindezi.
Izici ze-Tensile:I-tensile breaking stress kanye ne-breaking strain isetshenziswa kakhulu ngezinjongo zokulawula ikhwalithi, kodwa ayinani elingagculisi ngezinhloso zokuklama ngezizathu ezimbili: okokuqala, futhi okubaluleke kakhulu, i-PTFE akufanele neze isetshenziswe ezinhlobonhlobo ezingaphezu kwephuzu lokukhiqiza (iphuzu lapho ijika lokuguqulwa komthwalo linoshintsho oluhlukile lokuthambekela) futhi okwesibili, iphuzu lokuphuka lincike kusimo se-specimen ngakho-ke aliwusizo ekubikezeleni ukuziphatha ekusebenzeni.
Amajika okwandisa umthwalo oqinile atholwe nezibonelo ze-PTFE ancike ekukhanyeni kwekristalu, isisindo samangqamuzana, usayizi, umumo kanye mhlawumbe nesakhiwo sezinhlayiya zangempela kanye nobukhulu bamaphutha asele ngemva kokwenziwa.Ngaphezu kwalokho zincike, njengoba kuvamile nge-thermoplastics, ekuhlolweni kwezinga lokushisa kanye nezinga lokuqina.Ngenxa yalezi zinkinga idatha elapha ingabonisa kuphela ukuziphatha okuvamile.Amathrendi ajwayelekile okuziphatha ku-tension ye-PTFE njengomsebenzi wezinga lokushisa.Lawa amajika ajwayelekile okungatholakala kuwo ukucindezelwa kwesivuno, nakuba kuncane ngokunemba kunalokho okungenzeka kwezinye izinto eziningi zepulasitiki.
Ukusetshenziswa kwamandla kagesi aphezulu kwe-PTFE:Ngokuphathelene nezinhlelo zokusebenza zamandla kagesi aphezulu kwaziwa isikhathi eside ukuthi ukwehluleka kokuphuma kwamanzi kwenzeka ngokuguguleka, njengoba i-PTFE iyinto engalandeleli.U-Parr no-Scarisbrick baqhathanise ukuziphatha kohlu olubanzi lwama-polymeric insulators ngokuhlolwa kokulandela ngomkhondo kwe-IEE kusetshenziswa i-electrolyte, kanye nokuhlolwa kwe-ASTM-fog test (D21 32-62T).Bathole ukuthi i-PTFE ingelinye lekilasi lokuguguleka elibonisa impilo ende, okungukuthi > amahora angu-1000 ekuhlolweni kwenkungu yothuli.Ngakho-ke i-PTFE inezici zangaphezulu eziwusizo zokuxhashazwa ezinhlelweni zangaphandle.
Ukwakhiwa kwekhwalithi ephezulu kuzodingeka ukuze kukhiqizwe izakhiwo ezinezinga eliphansi kakhulu le-porosity kanye nokuvaleka kwangaphakathi okufunwa ukufakwa kwamandla kagesi aphezulu.Ukuhlolwa kusetshenziswa imitshina yokukhipha i-elekthronikhi kungenziwa ukuze kuqinisekiswe ukukhululeka ekukhishweni okulimazayo okungenzeka ku-voids.Okunye kungenzeka ukunciphisa ukukhishwa ngokumithisa i-PTFE ngoketshezi lwe-dielectric noma ngegesi enomfutho ophezulu ukuze ugcwalise, okungenani kancane, noma yiziphi izikhala ku-polymer.Ngenxa yalokho, amanani wamandla e-dielectric atholwe ekuhlolweni okwenziwe emafutheni angase abe phezulu ngokudukisayo ku-PTFE eyakheke kabi ngenxa yokungena kwanoma yiziphi izikhala ezikhona ngamafutha.
Isikhathi sokuthumela: Nov-24-2019