Iko friction coefficient ye PTFE
Iyo Friction Coefficient ye PTFE is Extremely Small
Iko friction coefficient ye PTFE idiki zvakanyanya, 1/5 chete yeiyo polyethylene, inova yakakosha hunhu hwefluorocarbon pamusoro. Nekuda kweakanyanya kuderera intermolecular masimba pakati pefluorine-kabhoni ketani mamorekuru, PTFE ine non-stick properties.
PTFE inochengetedza yakanakisa michina zvivakwa pamusoro petembiricha yakakura ye -196 kusvika 260 ℃, uye chimwe chehunhu hwefluorocarbon polymers ndechekuti haaite brittle pakudziya kwakaderera.
PTFE ine hupamhi hwepamusoro hwe2.14-2.20g/cm3, inenge isingabatanidzi, uye ine kuenzana kwekutora mvura isingasviki 0.01%. PTFE imhando yakapfava uye isina kusimba polima, ine diki intermolecular inokwezva masimba, yakaderera kuomarara, kuomarara, uye kusimba, uye inozokanganisa mukushushikana kwenguva refu.
PTFE inogara ichikwira pasi pemutoro uye ipurasitiki yakajairwa ine inotonhora inoyerera zvinhu. Kukambaira kwe PTFE inosiyana nekumanikidza kwakasiyana kwekumanikidza, tembiricha, uye madhigirii ekristaro, uye inowedzera nekuwedzera tembiricha. Kukambaira kwe PTFE iri pasi pe2% kana dhigirii rekristallini riri pakati pe55% ne80%, uye rinowedzera nekukurumidza kana dhigirii rekristallini riri pasi pe55% kana pamusoro pe80%.
Iyo yakanakisa mechanic pfuma ye PTFE ndiyo diki friction coefficient, iri pakati pe 0.01 ne 0.10, diki pakati pezvinhu zvepurasitiki zviripo uye kunyangwe zvese zveinjiniya.
Kupokana kwe PTFE inowedzera nekuwedzera sliding speed, uye inoita kuti idzikame kana mutsara wemutsara wasvika 0.5-1.0m/s kana kupfuura. Iyo static friction coefficient ye PTFE idiki pane dynamic friction coefficient. Kushandisa hunhu uhu mukubereka kugadzira kunogona kuderedza kutanga kuramba uye kuita kuti ifambe zvakanaka kubva pakutanga kusvika pakupedzisira.
Iko friction coefficient ye PTFE inoderera nekukura kwemutoro, uye inowanzogara isingachinji kana mutoro unosvika 0.8 MPa kana kupfuura. Pasi pekumhanya kukuru uye mutoro wakakwirira, iyo friction coefficient ye PTFE iri pasi pe0.01. Iko friction coefficient ye PTFE inoramba isina kushanduka kubva kune yekupedzisira-yakaderera tembiricha kusvika pakunyungudika kwayo, uye inongowedzera zvakanyanya kana tembiricha yepasi yakakwira kupfuura nzvimbo yekunyungudika. Nekuda kwediki intermolecular inokwezva masimba, yakaderera kuoma kwe PTFE, inopfekwa nyore nezvimwe zvinhu. Zvisinei, chero bedzi kushata kwepamusoro pezvipfeko zvakakodzera, kupfeka kwe PTFE inogona kuderedzwa kusvika pamwero wakati.