Nplaim taws retardants: Tus thib ob loj tshaj plaws roj hmab thiab yas ntxiv
Nplaim taws retardantyog tus sawv cev ntawm tus neeg sawv cev siv los tiv thaiv cov ntaub ntawv los ntawm kev ua kom tsis muaj hluav taws kub thiab txwv tsis pub muaj hluav taws kub. Nws yog tsuas yog siv nyob rau hauv cov ntaub ntawv polymer. Nrog rau cov ntawv thov dav thiab txhim kho cov roj hmab tiv thaiv hluav taws xob, cov roj hmab halogen siv cov nplaim hluav taws xob hauv qab thiab cov organic phosphorus nplaim retardants.
Inorganic nplaim taws retardantsUa haujlwm lub cev, uas muaj qhov tsawg heev thiab cov nyiaj ntau ntxiv. Nws muaj qee yam cuam tshuam rau cov ntaub ntawv ua tau zoo. Txawm li cas los xij, vim tus nqi qis nws tuaj yeem siv rau hauv cov khoom lag luam qis nrog cov khoom ua haujlwm tsawg, pvc, thiab lwm yam) ua ib qho kev tsis sib xws. Tus txheej txheem decomposition nqus cua sov thiab dej evaporation, yog li ua rau muaj qhov kub ntawm cov khoom saum npoo av, qeeb nrawm ntawm thermal tawg. Nyob rau tib lub sijhawm, dej vapor tuaj yeem dilute cov pa oxygen thiab tiv thaiv kev sib txuas nrog cov khoom saum npoo av, uas tuaj yeem txuas ntxiv rau hauv cov hluav taws.
Organic Halogen Fineed Retardantstsuas yog saws txoj kev tshuaj lom neeg. Nws txoj kev ua tau zoo yog qhov siab thiab ntxiv yog samlll nrog kev sib haum zoo nrog cov polymers. Lawv siv dav hauv cov khoom siv hluav taws xob, cov luam tawm cov laug cam thiab lwm cov khoom siv hluav taws xob. Txawm li cas los xij, lawv yuav emit lom thiab corrosive gases, uas muaj qee yam teeb meem kev nyab xeeb thiab ib puag ncig ib puag ncig.Brominated nplaim retardants (BFRS)feem ntau yog halogenated nplaim taws. Lwm tus yogchloro-series hluav taws retardants (CFRS)Cov. Lawv cov kev txiav txim siab tsis zoo yog qhov zoo li ntawm cov ntaub ntawv polymer. Thaum polymers yog rhuab thiab decomposed, bfrs kuj pib lwj, nkag mus rau cov khoom siv hluav taws xob ua ke nrog cov tshuaj tiv thaiv thermipition ua ke, inhibit cov tshuaj tiv thaiv thiab tiv thaiv cov nplaim hluav taws. Nyob rau tib lub sijhawm, cov tso tawm roj tso rau saum npoo ntawm cov khoom los thaiv thiab dilute cov oxygen conctrtration, thiab thaum kawg kev hloov pauv kev sib txuas kom txog thaum nws txiav tawm. Tsis tas li ntawd, BFRS feem ntau yog siv ua ke nrog cov tshuaj pleev ib sab oxide (ATO). ATO nws tus kheej tsis muaj nplaim retardancy, tab sis tuaj yeem ua raws li kev catalyst kom nrawm rau qhov kev txiav txim siab ntawm bromine lossis chlorine.
Organic phosphorus nplaim taws (OPFRS)Ua haujlwm ob leeg lub cev thiab tshuaj, nrog kev ua haujlwm siab thiab qhov zoo ntawm cov tshuaj lom tsawg, kav ntev thiab siab ua tus nqi. Ib qho ntxiv, nws kuj tseem tuaj yeem txhim kho cov tshuaj lom neeg ntawm alloy, muab cov kev ua haujlwm zoo tshaj plaws.
Txawm hais tias qhov sib ntxiv ntawm Fr tsis tuaj yeem ua rau cov khoom siv kom tsis txhob muaj qhov "flash hlawv, txo lub sijhawm muaj txiaj ntsig zoo rau cov neeg nyob hauv qhov hluav taws kub. Lub ntxiv dag zog ntawm lub teb chaws yuav tsum rau nplaim retardant thev naus laus zis kuj ua rau kev txhim kho zeem muag ntawm Frs ntau dav.
Lub Sijhawm Post: Nov-19-2021