PTFE cov yam ntxwv ua tau zoo

1. Cov khoom siv tshuaj

Polytetrafluoroethylene yog cov khoom siv tshuaj inert polymer zoo tshaj plaws ntawm cov paub organic sib txuas. Vim nws cov qauv tshwj xeeb, nws tuaj yeem tiv taus yuav luag txhua cov kua qaub, cov hauv paus muaj zog thiab cov kuab tshuaj organic. Txawm tias" Wang Shui" tsis muaj txoj kev coj nws. Thiab cov cuab yeej no tuaj yeem tswj hwm hauv qhov kub thiab txias, yog li cov khoom no tseem hu ua&"yas yas &";.

Cov hlau alkali hauv lub xeev molten raug cais los ntawm cov pa. Piv txwv li, cov hlau uas muaj tooj liab tuaj yeem tuaj yeem corrode saum polytetrafluoroethylene, ua rau cov tshuaj fluorine nyob ib puag ncig cov saw hlau raug cov tshuaj tiv thaiv oxidation nrog nws. Txoj kev siv feem ntau hauv kev lag luam yog siv sodium naphthalene tov los hloov cov polytetrafluoroethylene zaj duab xis lossis phaj hauv qhov xwm txheej ntawm kev tiv thaiv nitrogen lossis cais cov pa, yog li txhawm rau defluorination lossis oxidation ntawm polytetrafluoroethylene rau ntawm zaj duab xis lossis phaj, yog li ntawd, nws plam nws cov cuab yeej tsis lo thiab yooj yim rau sib xyaw nrog lwm cov ntaub ntawv.

2. Cov khoom cua sov

Teflon tuaj yeem qhia kev ruaj ntseg zoo nyob rau qhov kub thiab txias. Qhov kub ua haujlwm feem ntau yog-190 ~ 260 ℃, thiab cov ntsiab lus melting kub sib xws rau cov khoom siv no yog 327 ℃. Teflon tuaj yeem qhia kev ruaj ntseg zoo nyob rau qhov kub thiab txias. Qhov kub ua haujlwm feem ntau yog-190 ~ 260 ℃. Cov ntsiab lus melting kub sib xws rau cov khoom siv yog 327 ℃, thiab cov cua sov sib xws ua kom sov yog 420 ℃. Qhov no yog daim ntawv thov kub heev hauv cov khoom siv yas uas twb muaj lawm. Teflon tsis tshua muaj cua sov ua kom sov nyob hauv qhov xwm txheej qis dua 420 ℃, thiab tuaj yeem decomposed hauv qhov ntau ntau tsuas yog thaum nws ntau dua 420 ℃. Tag nrho cov nyiaj poob ntawm ib teev twg yog kwv yees li 0.01%, thiab nws qhov kev sib tsoo yuav tsim cov tshuaj lom hnyav xws li fluorophosgene thiab perfluoroisobutylene. Yog li ntawd, thaum kub ua PTFE, qhov kub ua haujlwm yuav tsum siab dua 400 ℃ txhawm rau tiv thaiv kev tsim qee yam kev pheej hmoo. Teflon tau sov tsis tu ncua ntawm 280 ℃ rau 72 teev, thiab nws lub zog tensile txo los ntawm 10% tom qab nws rov qab los rau chav sov. Ib qho ntxiv, Teflon tau siv sijhawm ntev ntawm 260 ℃, thiab tom qab ntawd hloov mus rau qhov chaw sov hauv chav, thiab nws lub zog tensile tseem nyob ntawm tus nqi muab. Yog li ntawd, nyob rau hauv cov nqe lus ntawm thermal decomposition, cov khoom siv tau tuaj yeem siv sijhawm luv luv ntawm 280 ℃ thiab txuas ntxiv ntawm 260 ℃. Ib qho ntxiv, los ntawm cov yam ntxwv ntawm Thermal Deformation, nyob rau hauv qhov xwm txheej ntawm qhov hnyav me me, cov khoom siv tau ntev ntev ntawm 260 ℃, thiab cov cua sov hloov pauv yog pom tseeb heev thaum lub nra nyob rau qib siab dua, nws siv sijhawm yog txo heev

3. Kev tiv thaiv hluav taws xob

Polytetrafluoroethylene yuav dhau mus rau ntau qhov kev puas tsuaj ntawm cov qauv hauv qab hluav taws xob. Raws li qhov ua tau zoo ntawm lub zog hluav taws xob Ray, C- C daim ntawv cog lus thiab C- F daim ntawv cog lus tawg nyob rau tib lub sijhawm, ua rau txo qhov hnyav ntawm lub cev hnyav thiab txo qis ntawm PTFE kev ua haujlwm. Ib qho ntxiv, nws cov hluav taws xob ruaj khov nyob hauv ib puag ncig lub tshuab nqus tsev yog qhov zoo dua li ntawm huab cua. Qhov no yog vim tias nyob rau hauv kev tiv thaiv cov pa roj inert hauv lub tshuab nqus tsev, ntxiv rau qhov ua kom tsis zoo ntawm PTFE, cov hluav taws xob sib txuas sib txuas ntawm cov tshuaj PTFE tseem yuav tshwm sim. Yog tias qhov ntsuas kub tau tsim nyog thiab tshuaj tiv thaiv hluav taws xob tsim nyog raug tswj, cov khoom siv kho mob PTFE yuav pom zoo dua, thiab cov hluav taws xob tiv taus cov khoom, siab thiab tsis kub tsis kam, huab cua permeability thiab kua nkag mus ua haujlwm tau zoo heev.