I-PTFE inezinto ezinhle kakhulu ezifana nokungangenisi kwamakhemikhali, ukumelana nokushisa (kokubili okuphezulu nokuphansi), izakhiwo zokuvala ugesi, i-coefficient ephansi yokungqubuzana (i-static 0.08 kanye ne-dynamic 0.01), kanye nempahla engenzi-sticki ebangeni elibanzi lokushisa (260 kuya ku-þ260 C).Inokuminyana kububanzi obungu-2.1e2.3 g/cm3 kanye ne-viscosity encibilikayo ebangeni le-1e10 GPa persecond.Isisindo samangqamuzana e-PTFE asinakulinganiswa ngezindlela ezijwayelekile.Kunalokho, indlela engaqondile isetshenziselwa ukwahlulela isisindo samangqamuzana.I-standard specific gravity (SSG) amandla adonsela phansi athile e-chip elungiswe ngokwenqubo emisiwe.Umgomo oyisisekelo ukuthi isisindo se-molecular ephansi i-PTFE icwebezela kakhulu, ngaleyo ndlela inikeze amanani aphezulu we-SSG.
I-PTFE engakaze incibilikiswe ngaphambilini inokucwebezela okungu-92e98%, okubonisa ukwakheka kwamangqamuzana aqondile futhi angenawo amagatsha.Lapho ifinyelela ku-342 C, iyancibilika ishintsha isuka kumbala omhlophe ochaki ibe yijeli ye-amorphous ekhanyayo.Iphuzu lesibili lokuncibilika le-PTFE lingu-327 C ngoba alilokothi liphinde likristale ngezinga elifanayo nangaphambi kokuncibilika kwayo kokuqala.
Ushintsho lwe-oda lokuqala nolwesibili lubikiwe ku-PTFE.Ushintsho oluseduze nezinga lokushisa legumbi luyintshisekelo engokoqobo ngenxa yomthelela ekucutshungulweni kwento.Ngaphansi kuka-19 C isistimu yekristalu ye-PTFE cishe iyi-triclinic ephelele.Ngaphezulu kuka-19 C, iyunithi yeseli ishintsha ibe i-hexagonal.Ebangeni le-19e30 C, izingxenye zamaketanga ziba ngokungahlelekile futhi isiqondiso se-crystallographic esithandwayo siyanyamalala, okuholela ekwandeni okukhulu kumthamo othize we-PTFE (1.8%) okufanele kucatshangelwe ekulinganiseni izilinganiso ze-Marticles ezenziwe kulawa mapulasitiki.
I-PTFE iyi-polymer ekwazi ukumelana namakhemikhali kakhulu phakathi kwe-thermoplastics.Okuhlukile kufaka phakathi izinsimbi ze-alkali ezincibilikisiwe, i-fluorine eyigesi emazingeni okushisa aphezulu nezingcindezi, nezinhlanganisela ezimbalwa ze-organic halogenated njenge-chlorine trifluoride (ClF3) ne-oxygen difluoride (OF2).Amanye amakhemikhali ambalwa kubikwe ukuthi ahlasela i-PTFE ngezinga lokushisa eliphezulu noma eduze nalo.I-PTFE ihlangana ne-80% ye-sodium noma i-potassium hydroxide kanye nezisekelo eziqinile ze-Lewis ezihlanganisa ama-hydrides ensimbi.
Izakhiwo zikagesi ze-PTFE ngokuvamile zingaphansi kobunjiniyela bepulasitiki kuzinga lokushisa legumbi.Ukuhlanganisa nama-filler kube yisu lokunqoba lokhu kushoda.I-PTFE inezici eziwusizo ezisetshenziswayo ekusetshenzisweni kwayo kwezinga lokushisa.
I-PTFE inezinto ezinhle kakhulu zikagesi ezifana nokumelana nokushisa okuphezulu, ukungaguquguquki okuphansi kwe-dielectric (2.1), kanye nesici esiphansi sokulahla.I-Dielectric constant kanye ne-disipation factor ihlala ingashintshile kububanzi obungu-40 kuye ku-250 C kanye no-5 Hz ukuya ku-10 GHz.Amandla okuqhekeka kwe-Dielectric (isikhathi esifushane) ngu-47 kV/mm ngefilimu enogqinsi ongu-0.25-mm.Amandla okuqhekeka kwe-Dielectric athuthukiswa ngokuncipha kwama-voids ku-PTFE, okuthintwa inqubo yokwenziwa.PTFE ihlaselwa imisebe, futhi ukuwohloka emoyeni kuqala ngethamo lika-0.02 Mrad.
Isikhathi sokuthumela: Apr-14-2018