PTFE ndi polima thermoplastic, amene ndi woyera olimba kutentha firiji, ndi kachulukidwe za 2200 makilogalamu/m3.Imasunga mphamvu zambiri, kulimba ndi kudzipaka paokha kutentha kwa 5 K (−268.15 °C; -450.67 °F), komanso kusinthasintha kwabwino pa kutentha pamwamba pa 194 K (−79 °C; -110 °F).PTFE imapindula ndi mphamvu zake kuchokera kumagulu a carbon-fluorine bond, monganso ma fluorocarbons onse.Mankhwala okhawo omwe amadziwika kuti amakhudza zomangira za carbon-fluorine ndi zitsulo zogwira ntchito kwambiri monga zitsulo za alkali, komanso kutentha kwambiri komanso zitsulo monga aluminiyamu ndi magnesium, ndi fluorinating agents monga xenon difluoride ndi cobalt (III) fluoride.
Coefficient of friction of plastics nthawi zambiri amayezedwa ndi chitsulo chopukutidwa.PTFE's coefficient of friction ndi 0.05 mpaka 0.10, chomwe ndi chachitatu chotsika kwambiri pa zinthu zolimba zomwe zimadziwika.Kukaniza kwa PTFE ku mphamvu za van der Waals kumatanthauza kuti ndi malo okhawo omwe nalimata sangathe kumamatira.PTFE ndi yoterera kotero kuti tizilombo sitingathe kugwira ndipo timakonda kugwa.
Chifukwa cha inertness yake yamankhwala, PTFE sichitha kulumikizidwa ngati elastomer.Chifukwa chake, ilibe "chikumbutso" ndipo imatha kukwawa.Chifukwa chapamwamba kwambiri mankhwala ndi matenthedwe katundu, PTFE nthawi zambiri ntchito ngati gasket zinthu m'mafakitale amene amafuna kukana mankhwala aukali monga mankhwala kapena processing mankhwala.Komabe, chifukwa chokonda kukwawa, kutha kwa nthawi yayitali kwa zidindo zotere kumakhala koipitsitsa kuposa ma elastomer omwe amawonetsa ziro, kapena pafupi ndi ziro, kukwakwa.
Kukonza PTFE kungakhale kovuta komanso kokwera mtengo, chifukwa kutentha kwakukulu kosungunuka, 327 °C (621 °F), kuli pamwamba pa kutentha koyambirira kwa kuwonongeka, 200 °C (392 °F).Ngakhale atasungunuka, PTFE sikuyenda, koma m'malo mwake imakhala ngati gel osakaniza chifukwa cha kusowa kwa gawo la crystalline komanso kusungunuka kwamphamvu kwambiri.
Zigawo zina za PTFE zimapangidwa ndi kuzizira kozizira, mawonekedwe a kuponderezana.Apa, ufa wabwino wa PTFE umakakamizika kukhala nkhungu pansi pazovuta kwambiri.Pambuyo pa nthawi yokhazikika, kuyambira mphindi zingapo mpaka masiku, nkhungu imatenthedwa pa 360 mpaka 380 madigiri Celsius, zomwe zimalola kuti tinthu tating'onoting'ono tigwirizane mu misa imodzi.
Nthawi yotumiza: Jun-18-2020