Lub monomer ntawm PTFE yog tetrafluoroethylene (TFE), thiab nws cov boiling point yog -76.3 degrees Celsius.Nws yog qhov tawg heev nyob rau hauv lub xub ntiag ntawm oxygen thiab tuaj yeem muab piv rau cov hmoov phom.Yog li ntawd, nws cov khoom tsim, cia thiab siv hauv kev lag luam xav tau kev tiv thaiv nruj heev, cov zis kuj yuav tsum tau tswj hwm, uas kuj yog ib qho tseem ceeb ntawm PTFE tus nqi.TFE feem ntau yog siv dawb radical ncua kev kawm ntawv polymerization nyob rau hauv kev lag luam, siv persulfate raws li ib tug pib, cov tshuaj tiv thaiv kub ntawm 10-110 degrees Celsius, txoj kev no yuav tau txais heev molecular hnyav PTFE (txawm yuav muaj ntau tshaj 10 lab), tsis muaj cov saw saw hloov pauv tshwm sim.
Txij li thaum lub melting point ntawm PTFE yog siab heev, uas yog nyob ze rau lub decomposition kub, thiab nws cov molecular loj tsis me me, nws yuav luag tsis yooj yim sua kom ua tiav qhov zoo tagnrho yaj txaus tus nqi los ntawm tsuas yog cia siab rau cua sov zoo li cov thermoplastic polymers.Teflon daim kab xev los yog Teflon raj ua li cas?Nyob rau hauv cov ntaub ntawv ntawm molding, PTFE hmoov feem ntau yog poured rau hauv pwm, thiab ces rhuab thiab pressurized rau sinter hmoov.Yog xav tau extrusion, hydrocarbon tebchaw yuav tsum tau ntxiv rau PTFE los pab nplawm thiab ntws.Tus nqi ntawm cov hydrocarbon tebchaw yuav tsum tau tswj nyob rau hauv ib tug tej yam ntau yam, txwv tsis pub nws yog ib qho yooj yim ua rau extrusion siab heev los yog tiav cov khoom tsis xws luag.Tom qab daim ntawv xav tau, cov hydrocarbon tebchaw raug tshem tawm los ntawm cua sov qeeb, thiab tom qab ntawd rhuab thiab sintered los ua cov khoom kawg.
Kev siv PTFE
Ib qho ntawm cov kev siv tseem ceeb ntawm PTFE yog li txheej txheej.Los ntawm lub lauj kaub me me uas tsis yog-stick hauv tsev mus rau sab nrauv phab ntsa ntawm lub qhov cub dej, koj tuaj yeem hnov cov nyhuv ntawm cov txheej txheem no.Lwm yam kev siv yog sealing daim kab xev, xaim txheej tiv thaiv, chim sab hauv txheej, tshuab qhov chaw, labware, thiab lwm yam. Yog hais tias koj xav tau ib yam khoom siv rau hnyav hnyav, ces xav txog nws, tej zaum yuav muaj kev npaj txhij txog.
Post lub sij hawm: Aug-29-2022