I-PTFE i-polymer ye-thermoplastic, eqinile emhlophe ekamelweni lokushisa, enokuminyana okungaba ngu-2200 kg/m3.Igcina amandla aphezulu, ukuqina kanye nokuzithambisa emazingeni okushisa aphansi kuze kufike ku-5 K (−268.15 °C; -450.67 °F), futhi ikwazi ukuguquguquka kahle emazingeni okushisa angaphezu kuka-194 K (−79 °C; -110 °F).I-PTFE izuza izakhiwo zayo kusukela kumphumela ohlanganisiwe webhondi ye-carbon-fluorine, njengoba kwenza wonke ama-fluorocarbons.Amakhemikhali okuwukuphela kwawo aziwa ukuthi athinta la mabhondi e-carbon-fluorine ayizinsimbi ezisebenza kakhulu njengezinsimbi ze-alkali, futhi emazingeni okushisa aphezulu nezinsimbi ezinjenge-aluminium ne-magnesium, nama-fluorinating agents afana ne-xenon difluoride ne-cobalt(III) fluoride.
I-coefficient of friction of plastics ngokuvamile ikalwa ngensimbi epholishiwe.I-PTFE's coefficient of friction ngu-0.05 kuya ku-0.10, okuyindawo yesithathu ephansi kunanoma iyiphi into eqinile eyaziwayo.Ukumelana kwe-PTFE namandla e-van der Waals kusho ukuthi iyona ndawo kuphela eyaziwayo isigcilikisha esingakwazi ukunamathela kukho.Eqinisweni, i-PTFE ingasetshenziswa ukuvimbela izinambuzane ezikhuphukela phezulu ezipendwe ngento.I-PTFE iyashelela kangangokuthi izinambuzane azikwazi ukubamba futhi zivame ukuwa.
Ngenxa yokungangeni kwayo kwamakhemikhali, i-PTFE ayikwazi ukuxhunyaniswa njenge-elastomer.Ngakho-ke, ayinayo "inkumbulo" futhi ingaphansi kokukhasa.Ngenxa yamakhemikhali ayo aphezulu kanye nezindawo ezishisayo, i-PTFE ivamise ukusetshenziswa njengempahla ye-gasket ngaphakathi kwezimboni ezidinga ukumelana namakhemikhali anolaka njengemithi noma ukucubungula amakhemikhali.Nokho, ngenxa yokuthambekela kokunyonyoba, ukusebenza kwesikhathi eside kwalezi zimvu zamanzi kubi kakhulu kunama-elastomer abonisa amazinga aqandayo, noma acishe abe ziro.
Ukucubungula i-PTFE kungaba nzima futhi kubize, ngoba izinga lokushisa eliphezulu lokuncibilika, 327 °C (621 °F), lingaphezu kwezinga lokushisa lokuqala lokubola, 200 °C (392 °F).Ngisho noma incibilikile, i-PTFE ayigelezi, kodwa kunalokho iziphatha njengejeli ngenxa yokungabikho kwesigaba secrystalline kanye ne-viscosity ephezulu yokuncibilika.
Ezinye izingxenye ze-PTFE zenziwe ngokubumba okubandayo, uhlobo lokubumba kokucindezelwa.Lapha, i-PTFE eyimpuphu ecolekile iphoqelelwa ukuba ibe isikhunta ngaphansi kwengcindezi ephezulu.Ngemva kwesikhathi sokumisa, esihlala emaminithini kuya ezinsukwini, isikhunta sishiswa ku-360 kuya ku-380 degrees Celsius, okuvumela izinhlayiya ezinhle ukuthi zihlangane zibe yinqwaba eyodwa.
Isikhathi sokuthumela: Jun-18-2020