Dab tsi yog cov nplaim ci retardant mechanism ntawm kev nthuav dav nplaim retardants?
Sucrose reacts nrog concentrated sulfuric acid los ua ib lub poroon txheej.
Mloog cov txiv lws suav sulfuric muaj cov khoom qhuav zog thiab ua C.
Tom qab ntawd c thiab concellidic sulfuric acid yauv oxidation -}}}}} pabon dioxide thiab carbon dioxide roj.
Cov tshuaj tiv thaiv txuas ntxiv thiab thaum kawg ua rau cov roj carbon monect. Txij ntawm no, cov nplaim hluav taws retardant mechanism ntawm nplaim retardants (IFR) yog maj mam tawm tshiab. Yog lawm, nplaim taws retardants tsuas yog siv lawv cov nplaim taws retardant nyhuv los ntawm coalescing.
Feem ntau hais lus, IFR suav nrog cov khoom siv roj (feem ntau polyhydroxy tebchaw xws li pentaTxoj kev (xws li melmine polyphphate), thiab ua npuas ncauj tsim cov roj carbon monection) los ntawm cov txheej txheem roj carbon monoxide.
Cov kauj ruam tshwj xeeb:
1.Qhov qis dua kub (nyob ib ncig ntawm 150 degree, nyob ntawm cov khoom ntawm cov kua qaub ua rau cov acids uas tuaj yeem kwv yees polyols thiab ua raws li cov neeg sawv cev qhuav.
2. Ntawm qhov ntsuas kub siab dua qhov kub thiab txias dua li cov kua qaub, thiab cov khoom siv roj carbon monoman), thiab cov khoom siv roj carbon monoxide), thiab cov khoom siv roj carbon monoxide), thiab cov khoom siv roj carbon monoxide), thiab cov khoom siv roj carbon monoxide), thiab cov khoom siv roj carbon monoxide), thiab cov pa roj carbon monoxide), thiab cov pa roj carbon monoxide), thiab cov pa roj carbon monoxide), thiab cov pa roj carbon monoxide), thiab cov pa roj carbon monoxide), thiab cov roj carbon (carbon)
Lub kaw lus melts ua ntej lossis thaum lub sij hawm Esterification cov tshuaj tiv thaiv.
Cov dej uas muaj cov dej uas tau tsim tawm thaum lub sijhawm cov tshuaj tiv thaiv thiab cov roj tsis sib xws tau tsim los ntawm cov roj gas qhov ua rau cov pa roj uas twb tau metand los nthuav dav thiab ua npuas ncauj. Nyob rau tib lub sijhawm, polyols thiab esters yuj rho tawm thiab ua cov tshuaj sib xyaw, cov khoom seem thiab ua npuas dej txuas ntxiv thiab ua npuas ncauj.
Thaum cov tshuaj tiv thaiv yuav luag tiav, cov kab ke gelatinizes thiab solivies, thiab thaum kawg cov porous poroon txheej.
Dab tsi yog qhov ua haujlwm ntawm cov carbonized txheej tsim?
Ua rau nws nyuaj rau cov cua sov kom nkag mus rau theem condensed.
Nws tuaj yeem tiv thaiv cov tshuaj oxygen los ntawm qhov sib txawv los ntawm cov nruab nrab ib puag ncig mus rau hauv cov khoom siv polymer.
Nws tuaj yeem tiv thaiv cov roj lossis cov kua ua kua tsim los ntawm kev tsis txaus ntseeg los ntawm kev khiav dim ntawm cov khoom.
khoom pab
Qhov tseeb, thaum lub nplaim hluav taws retardant txheej txheem ntawm nthuav cov nplaim taws retardants, peb kuj yuav tsum tau txo cov khoom muaj frammability ntawm qee cov txhais tau tias, xws li:
1. Txhim kho tus nqi ntawm cov roj carbonancation thiab txo cov khoom ntawm cov khoom sib txuas hauv thaj chaw combusion Inhibition.
2.
3. Ua kom cov tuab ntawm cov roj carbon txheej thiab txo nws cov thermal conductivity.
4. Txo cov permeability ntawm cov pa roj carbon txheej thiab nce cov kuab tshuaj ntawm cov khoom lag luam siab ua kua cov khoom, yog li txo lawv txoj kev mus ncig.
Cov nplaim hluav taws xob nthuav dav retardant system feem ntau muaj peb ntu: Access acid los, thiab cov pa roj
Cov kua qaub feem ntau yog inorganic acids lossis cov tebchaw uas tuaj yeem tsim cov kua ntses uas tuaj yeem ua rau qhov kub thiab txias, xws li phosphorus oxychhloride, thiab kub thiab lwm yam; Cov pa roj carbon, kuj muaj npe hu ua cov pa roj carbon, yog lub hauv paus rau kev tsim cov ntsiab lus ntawm cov pa roj carbon monox, feem ntau yog pentarotholritol, hmoov txhuv nplej siab, thiab lwm yam; Qhov chaw tsim roj, tseem hu ua npuas dej, cov khoom siv ua npuas dej suav nrog cov nplaim hluav taws xob, thiab lwm yam tuaj yeem tsim cov tshuaj tua hluav taws nrog tus neeg saib xyuas cov pa roj carbon. Tom qab lub cev qhuav dej thiab hla -}} kev lag luam ntawm cov tshuaj, cov pa roj carbon. Nyob rau tib lub sijhawm, tus neeg sawv cev ua npuas ncauj tso cov roj ntau ntxiv los pab nthuav cov roj carbon txheej. Lub tuab carbon txheej nce qhov ntsuas kub thiab cov pa roj carient ntawm cov pa roj av, thaum muaj cov nplaim taws ntxiv, yog li nplaim taws retardant tus retardant lub sij hawm ntawm lub sijhawm ntawm lub sijhawm.
