Cov txiaj ntsig thiab qhov tsis zoo ntawm kev ntxiv hydrotalcite rau calcium zinc stabilizers yog dab tsi?

Hydrotalc yog ib yam khoom siv tseem ceeb rau cov calcium zinc stabilizers. Hydrotalc muaj cov qauv tshwj xeeb thiab cov khoom, thiab nws cov khoom yooj yim tshaj plaws yog alkalinity thiab ntau porosity, nrog rau kev ua tau zoo thiab ua tau zoo. Nws tuaj yeem nqus tau cov hydrogen chloride uas tso tawm thaum lub sijhawm PVC puas tsuaj, qeeb qeeb cov nyhuv catalytic ntawm hydrogen chloride rau PVC resin, thiab ua haujlwm ua cov kua qaub, uas tseem hu ua thermal stability. Nws feem ntau siv ua thermal stabilizer.
Hydrotalc kuj muaj qhov zoo ntawm kev pom tseeb zoo, rwb thaiv tsev, tiv taus huab cua, thiab ua tau yooj yim. Nws tsis muaj kuab paug los ntawm sulfides, tsis muaj tshuaj lom, thiab tuaj yeem ua haujlwm ua ke nrog cov tshuaj tiv thaiv cua sov xws li xab npum zinc thiab cov organic tin. Nws yog ib hom tshuaj tiv thaiv cua sov uas tsis muaj tshuaj lom.
Cov qauv ntawm hydrotalcite yog txheej nrog qhov sib nrug loj ntawm 0.76-0.79 nm, thiab nws muaj thaj chaw loj tshwj xeeb, uas tso cai rau nws cov pab pawg hydroxyl saum npoo av kom ua tiav nrog hydrogen chloride thiab muaj cov txiaj ntsig zoo rau cov stabilizers.
Cov kev tsis zoo ntawm hydrotalcite yog:
1. Hais txog qhov pib dawb, hydrotalcite tsis muaj feem cuam tshuam rau kev txhim kho PVC thawj xim ib leeg lossis ua ke nrog calcium zinc system. Tom qab laus hauv qhov cub kub 180 ℃, cov xim qauv feem ntau yog xim liab.
2. Txog kev ruaj khov ntawm Congo liab cua sov, qhov kev ua ib zaug ntawm hydrotalcite tuaj yeem txhim kho lub sijhawm thermal stability ntawm PVC, thiab nrog rau kev nce ntxiv ntawm qhov ntxiv, lub sijhawm thermal stability ntawm PVC qhia txog kev nce ntxiv, tab sis qhov nce tsis tseem ceeb.
3. Thaum siv cov hydrotalcite thiab calcium zinc ua ke ua ke ua ib qho thermal stabilizer, lub sijhawm thermal stability ntawm PVC tau zoo dua qub, thiab qhov sib txawv ntawm kev nce lub sijhawm thermal stability nrog rau kev nce ntxiv kuj tau txaus siab. Yog li ntawd, dihydroxy hlau hydroxides yuav tsum tau muab faib ua cov khoom siv thermal stabilizers ntev, uas tuaj yeem ua kom ntev lub sijhawm thermal stability ntev ntawm PVC. Yog li, thaum sib xyaw calcium zinc stabilizers, hydrotalcite yog ib qho ntawm cov khoom siv raw tseem ceeb.