IiPropati ze-PTFE kunye noLungiso lweMveliso ye-PTFE

I-PTFE yipolymer ye-thermoplastic, eqinileyo emhlophe kwiqondo lobushushu begumbi, kunye noxinano malunga ne-2200 kg/m3.Igcina amandla aphezulu, ukuqina kunye nokuzithambisa kumaqondo obushushu asezantsi ukuya kutsho ku-5 K (−268.15 °C; -450.67 °F), kunye nokuguquguquka okulungileyo kumaqondo obushushu angaphezu kwe-194 K (−79 °C; -110 °F).I-PTFE izuza iipropati zayo kwisiphumo esidityanisiweyo sebhondi ye-carbon-fluorine, njengazo zonke ii-fluorocarbons.Ekuphela kweekhemikhali ezaziwa ukuba zichaphazela ezi bhondi zekhabhoni-fluorine zizinyithi ezisebenza kakhulu njengeentsimbi zealkali, kwaye kumaqondo obushushu aphezulu ngokunjalo nezinyithi ezifana nealuminiyam nemagnesium, kunye neearhente zokuthambisa ezifana nexenon difluoride kunye necobalt(III) fluoride.

I-coefficient of friction yeeplastiki idla ngokulinganiswa nentsimbi epholisiweyo.I-PTFE's coefficient of friction yi-0.05 ukuya ku-0.10, eyesithathu-esezantsi kuyo nayiphi na imathiriyeli eyaziwayo eqinileyo.Ukuchasa kwe-PTFE kumandla e-van der Waals kuthetha ukuba nguwo kuphela umphezulu owaziwayo apho inqinishe lingenako ukunamathela.Enyanisweni, i-PTFE ingasetyenziselwa ukuthintela izinambuzane ezinyukela phezulu kwindawo epeyintwe ngemathiriyeli.I-PTFE imtyibilizi kangangokuba izinambuzane azikwazi ukubamba kwaye zidla ngokuwa.

Ngenxa yokungangeni kweekhemikhali, i-PTFE ayikwazi ukudityaniswa njenge-elastomer.Ngoko ke, ayinayo "inkumbulo" kwaye ixhomekeke ekukhambeni.Ngenxa yeekhemikhali eziphezulu kunye neempawu zokushisa, i-PTFE isoloko isetyenziswa njengesixhobo se-gasket ngaphakathi kwamashishini afuna ukuxhathisa kwiikhemikhali ezinobundlobongela ezifana namayeza okanye ukusetyenzwa kweekhemikhali.Nangona kunjalo, ngenxa yokuthanda ukurhubuluza, ukusebenza kwexesha elide kwezo tywina kubi kuneeelastomers ezibonisa u-zero, okanye kufutshane no-zero, amanqanaba okurhubuluza.

Ukusetyenzwa kwe-PTFE kunokuba nzima kwaye kubize kakhulu, kuba ubushushu obunyibilikayo obuphezulu, 327 °C (621 °F), bungaphezulu kweqondo lobushushu lokuqala lokubola, 200 °C (392 °F).Naxa inyibilika, i-PTFE ayihambi, kodwa endaweni yoko iziphatha njengejeli ngenxa yokungabikho kwesigaba sekristale kunye ne-viscosity ephezulu yokunyibilika.

Ezinye iindawo ze-PTFE zenziwe ngokubumba okubandayo, uhlobo lokubumba ucinezelo.Apha, i-PTFE yomgubo ocolekileyo unyanzelwa ukuba ibe ngumbumba phantsi koxinzelelo oluphezulu.Emva kwexesha lokumisa, elihlala kwimizuzu ukuya kwiintsuku, isikhunta sifudumala kwi-360 ukuya kwi-380 degrees Celsius, evumela ukuba iincinci ezincinci zidibanise kwisisindo esisodwa.