I-PTFE ineempawu ezigqwesileyo ezifana nokungangeni kweekhemikhali, ukuxhathisa ubushushu (zombini eziphezulu nezisezantsi), iipropati zokugquma umbane, i-coefficient ephantsi yokukhuhlana (i-static 0.08 kunye ne-dynamic 0.01), kunye nepropathi yokungakhuseli kuluhlu olubanzi lobushushu (260 ukuya ku-þ260 C).Inobunzima kuluhlu lwe-2.1e2.3 g / cm3 kunye ne-viscosity enyibilikayo kuluhlu lwe-1e10 GPa persecond.Ubunzima bemolekyuli ye-PTFE ayinakulinganiswa ngeendlela eziqhelekileyo.Endaweni yoko, indlela engangqalanga isetyenziselwa ukugweba ubunzima bemolekyuli.Umxhuzulane oqhelekileyo oqhelekileyo (SSG) ngumxhuzulane okhethekileyo wechip olungiselelwe ngokwenkqubo esemgangathweni.Umgaqo osisiseko kukuba ubunzima obuphantsi bemolekyuli ye-PTFE iqaqambisa kakhulu, ngaloo ndlela inika amaxabiso aphezulu e-SSG.
I-PTFE engazange inyibilike ngaphambili ine-crystallinity ye-92e98%, ebonisa umgca kunye nesakhiwo se-molecular nonbranched.Ekufikeleleni kwi-342 C, iyanyibilika itshintsha ukusuka kumbala omhlophe ochalky ukuya kwijeli ye-amorphous ebonakalayo.Indawo yesibini yokunyibilika ye-PTFE yi-327 C kuba ayinakuze iphinde iphinde iphinde iphinde iphinde ibuyele kumlinganiselo ofanayo nangaphambi kokunyibilika kwayo kokuqala.
I-oda yokuqala kunye notshintsho lwesibini luye lwabikwa kwi-PTFE.Utshintsho olusondeleyo kwiqondo lokushisa kwegumbi lunomdla osebenzayo ngenxa yempembelelo ekuqhutyweni kwezinto.Ngaphantsi kwe-19 C inkqubo yecrystalline ye-PTFE yi-triclinic ephantse igqibelele.Ngaphezulu kwe-19 C, iyunithi yeseli itshintsha ibe ngu-hexagonal.Kuluhlu lwe-19e30 C, amacandelo e-chain akhula ngokungahambi kakuhle kwaye isalathiso esikhethiweyo se-crystallographic siyanyamalala, okubangela ukwanda okukhulu kumthamo othile we-PTFE (1.8%) okufuneka kuqwalaselwe ukulinganisa imilinganiselo yeMarticles eyenziwe kwezi plastiki.
I-PTFE yeyona nto ixhaphakileyo kwi-polymer phakathi kwe-thermoplastics.Izinto ezingaphandle ziquka isinyithi esinyibilikisiweyo sealkali, igesi yefluorine kumaqondo obushushu aphezulu kunye noxinzelelo, kunye neekhompawundi ezimbalwa zeorganic halogenated ezifana nechlorine trifluoride (ClF3) kunye neoksijini difluoride (OF2).Ezinye iikhemikhali ezimbalwa ziye zabikwa ukuba zihlasele i-PTFE okanye kufuphi nobushushu benkonzo yayo ephezulu.I-PTFE isabela nge-80% yesodium okanye i-potassium hydroxide kunye neziseko ezithile ezomeleleyo zeLewis eziquka iihydrides zetsimbi.
Iipropathi zoomatshini ze-PTFE zihlala zingaphantsi kwiiplastiki zobunjineli kwiqondo lobushushu begumbi.Ukudityaniswa nezigcwali ibe sisicwangciso-qhinga ukoyisa oku kunqongophala.I-PTFE ineempawu eziluncedo zoomatshini kuluhlu lwayo lobushushu bokusetyenziswa.
I-PTFE ineempawu ezibalaseleyo zombane ezifana nokumelana nokugquma okuphezulu, ukungaguquguquki kwe-dielectric ephantsi (2.1), kunye ne-low dissipation factor.I-Dielectric rhoqo kunye ne-dissipation factor ihlala ingatshintshi kuluhlu lwe-40 ukuya kwi-250 C kunye ne-5 Hz ukuya kwi-10 GHz.Amandla okuqhekeka kwe-dielectric (ixesha elifutshane) yi-47 kV/mm kwifilimu engqindilili ye-0.25 mm.Amandla okuqhekeka kwe-dielectric aphuculwa ngokuhla kwe-voids kwi-PTFE, echaphazelekayo yinkqubo yokwenziwa.PTFE ihlaselwa yimitha, kwaye ukuchithwa emoyeni kuqala kwi-dose ye-0.02 Mrad.
Ixesha lokuposa: Apr-14-2018