I-coefficient ye-friction ye PTFE
I-Friction Coefficient ye PTFE Incane Kakhulu
I-coefficient ye-friction ye PTFE incane kakhulu, i-1/5 kuphela yaleyo ye-polyethylene, okuyisici esibalulekile sendawo ye-fluorocarbon. Ngenxa yamandla aphansi kakhulu e-intermolecular phakathi kwama-molecule e-fluorine-carbon chain, PTFE inezinto ezinganamathele.
PTFE igcina izakhiwo ezinhle kakhulu zemishini phezu kwezinga lokushisa elibanzi elingu -196 kuya ku-260℃, futhi enye yezimpawu zamapholima e-fluorocarbon ukuthi awabi brittle emazingeni okushisa aphansi.
PTFE inokuminyana okuphezulu okungu-2.14-2.20g/cm3, cishe ayimundi, futhi inezinga elilinganayo lokumunca amanzi elingaphansi kuka-0.01%. PTFE iyi-polymer evamile ethambile futhi ebuthakathaka, enamandla amancane e-intermolecular akhangayo, ukuqina okuphansi, ubulukhuni, namandla, futhi izokhubaza ngaphansi kwengcindezi yesikhathi eside.
PTFE ijwayele ukungena ngaphansi komthwalo futhi iyipulasitiki evamile enezindawo zokugeleza ezibandayo. Ukukhasa kwe PTFE iyahlukahluka ngokucindezeleka okucindezelwayo okuhlukene, amazinga okushisa, namadigri ekristalu, futhi ikhuphuka ngokukhuphuka kwezinga lokushisa. Ukukhasa kwe PTFE ingaphansi kuka-2% lapho izinga lokucwebezela liphakathi kuka-55% no-80%, futhi likhula ngokushesha lapho izinga lokucwebezela lingaphansi kwama-55% noma ngaphezulu kwama-80%.
Impahla enhle kakhulu yemishini ye PTFE i-coefficient yayo encane yokungqubuzana, ephakathi kuka-0.01 no-0.10, encane kunazo zonke phakathi kwezinto ezikhona zepulasitiki ngisho nazo zonke izinto zobunjiniyela.
Ukungqubuzana kwe PTFE inyuka ngesivinini esikhulayo sokuslayida, futhi ijwayele ukuzinza lapho isivinini somugqa sifinyelela ku-0.5-1.0m/s noma ngaphezulu. I-static friction coefficient ye PTFE incane kune-dynamic friction coefficient. Ukusebenzisa lesi sici ekukhiqizeni okuthwala kunganciphisa ukumelana nokuqala futhi kukwenze kusebenze kahle kusukela ekuqaleni kuze kube sekugcineni.
I-coefficient ye-friction ye PTFE iyancipha ngomthwalo okhulayo, futhi ijwayele ukuhlala njalo lapho umthwalo ufinyelela ku-0.8 MPa noma ngaphezulu. Ngaphansi kwesivinini esikhulu nomthwalo ophezulu, i-coefficient yokungqubuzana kwe PTFE ingaphansi kuka-0.01. I-coefficient ye-friction ye PTFE ihlala icishe ingashintshile ukusuka kumazinga okushisa aphansi kakhulu ukuya endaweni yawo yokuncibilika, futhi ikhuphuka kakhulu kuphela lapho izinga lokushisa elingaphezulu lingaphezulu kwendawo yokuncibilika. Ngenxa yamandla amancane ama-intermolecular akhangayo, ubulukhuni obuphansi be PTFE, igqokwa kalula ngezinye izinto. Kodwa-ke, inqobo nje uma ubulukhuni obungaphezulu bempahla yokugqoka bufanelekile, ukugqokwa kwe PTFE zingancishiswa ngezinga elikhulu.