I-coefficient ye-friction ye PTFE
I-Friction Coefficient ye PTFE iNcinci kakhulu
I-coefficient ye-friction ye PTFE incinci kakhulu, yi-1/5 kuphela yaleyo ye-polyethylene, oluphawu olubalulekileyo lomphezulu we-fluorocarbon. Ngenxa yamandla aphantsi kakhulu e-intermolecular phakathi kweemolekyuli ze-fluorine-carbon chain, PTFE ineempawu zokungakhuni.
PTFE igcina iipropathi ezigqwesileyo zoomatshini kuluhlu olubanzi lobushushu obuphakathi kwe -196 ukuya ku-260℃, kwaye enye yeempawu zeepholima ze-fluorocarbon kukuba azibi brittle kumaqondo obushushu aphantsi.
PTFE inobuninzi obuphezulu be-2.14-2.20g / cm3, phantse ayifuni, kwaye inezinga elilinganayo lokufunxa amanzi elingaphantsi kwe-0.01%. PTFE yipolymer eqhelekileyo ethambileyo kunye nebuthathaka, enamandla amancinci e-intermolecular, ukuqina okuphantsi, ubulukhuni, kunye namandla, kwaye iya kukhubaza phantsi koxinzelelo lwexesha elide.
PTFE ithanda ukurhubuluza phantsi komthwalo kwaye yiplastiki eqhelekileyo eneempawu zokuqukuqela okubandayo. Ukuhamba kwe PTFE iyahluka ngoxinzelelo olucinezelayo olwahlukeneyo, amaqondo obushushu, kunye needigri zecrystallinity, kwaye inyuka ngokunyuka kwamaqondo obushushu. Ukuhamba kwe PTFE ingaphantsi kwe-2% xa i-degree of crystallinity iphakathi kwe-55% kunye ne-80%, kwaye inyuka ngokukhawuleza xa iqondo le-crystallinity lingaphantsi kwe-55% okanye ngaphezulu kwe-80%.
Ipropathi egqwesileyo yoomatshini ye PTFE sisilinganiselo sayo esincinci sokukhuhlana, esiphakathi kwe-0.01 kunye ne-0.10, eyona incinci phakathi kwezinto ezikhoyo zeplastiki kunye nazo zonke izixhobo zobunjineli.
Ingxabano ye PTFE inyuka ngokunyuka kwesantya sokutyibilika, kwaye ithande ukuzinza xa isantya somgca sifikelela kwi-0.5-1.0m/s okanye ngaphezulu. Umlinganiso omileyo wokukhuhlana we PTFE incinci kune-coefficient yokukhuhlana okuguquguqukayo. Ukusebenzisa olu phawu ekuveliseni imveliso kunokunciphisa ukuxhathisa ukuqala kwaye kuqhube kakuhle ukusuka ekuqaleni ukuya ekupheleni.
I-coefficient ye-friction ye PTFE iyancipha ngomthwalo okhulayo, kwaye ithande ukuhlala rhoqo xa umthwalo ufikelela kwi-0.8 MPa okanye ngaphezulu. Ngaphantsi kwesantya esiphezulu kunye nomthwalo ophezulu, i-coefficient ye-friction ye PTFE ingaphantsi kwe-0.01. I-coefficient ye-friction ye PTFE ihlala phantse ingatshintshanga ukusuka kwiqondo lobushushu eliphantsi kakhulu ukuya kwindawo yokunyibilika kwayo, kwaye inyuka kabukhali kuphela xa ubushushu bomphezulu buphezulu kunendawo yokunyibilika. Ngenxa yamandla amancinci anomtsalane we-intermolecular, ubunzima obuphantsi be PTFE, inxiba lula ngezinye izinto. Nangona kunjalo, ngokude nje uburhabaxa bomphezulu bezinto zokunxiba bufanelekile, ukunxiba kwe PTFE inokuncitshiswa kakhulu.