Kodi ubwino ndi kuipa kowonjezera hydrotalcite ku calcium zinc stabilizers ndi kotani?

Hydrotalc ndi chinthu chofunikira kwambiri popanga zinthu zokhazikika za calcium zinc. Hydrotalc ili ndi kapangidwe ndi makhalidwe ake apadera, ndipo makhalidwe ake ofunikira kwambiri ndi alkalinity ndi multi porosity, yokhala ndi magwiridwe antchito apadera komanso ogwira ntchito bwino. Imatha kuyamwa bwino hydrogen chloride yomwe imatulutsidwa panthawi ya kuwonongeka kwa PVC, kuchepetsa mphamvu ya hydrogen chloride yokha pa PVC resin, ndikugwira ntchito ngati asidi woyamwa, yomwe imadziwikanso kuti thermal stability. Imagwiritsidwa ntchito kwambiri ngati thermal stabilizer.
Hydrotalc ilinso ndi ubwino wokhala ndi mawonekedwe abwino, kutchinjiriza kutentha, kukana nyengo, komanso kusinthasintha. Sichidetsedwa ndi sulfides, sichimayambitsa poizoni, ndipo chingagwire ntchito mogwirizana ndi zinthu zolimbitsa kutentha monga sopo wa zinc ndi organic tin. Ndi mtundu wabwino kwambiri wa cholimbitsa kutentha chothandizira chosakhala ndi poizoni.
Kapangidwe ka hydrotalcite kali ndi zigawo zazikulu za 0.76-0.79nm, ndipo kali ndi malo akuluakulu apadera, zomwe zimathandiza magulu ake a hydroxyl kuti agwirizane mokwanira ndi hydrogen chloride ndipo zimakhudza kwambiri zokhazikika.
Zoyipa za hydrotalcite ndi izi:
1. Ponena za kuyera koyambirira, hydrotalcite siikhudza kusintha kwa utoto woyambirira wa PVC kokha kapena mogwirizana ndi dongosolo la calcium zinc. Pambuyo pokalamba mu uvuni wotentha wa 180 ℃, mtundu wa chitsanzo umakhala wofiira.
2. Pa kukhazikika kwa kutentha kofiira kwa Congo, ntchito imodzi ya hydrotalcite imatha kusintha nthawi yokhazikika ya kutentha kwa PVC, ndipo ndi kuwonjezeka kwa kuchuluka kwa zowonjezera, nthawi yokhazikika ya kutentha kwa PVC ikuwonetsa kuwonjezeka, koma kuwonjezeka sikukudziwika.
3. Pamene kuphatikiza kwa hydrotalcite ndi calcium zinc system kugwiritsidwa ntchito ngati chokhazikika pa kutentha, nthawi yokhazikika pa kutentha ya PVC imakula kwambiri, ndipo chizolowezi chowonjezera nthawi yokhazikika pa kutentha ndi kuchuluka kowonjezera chimakwaniritsidwa. Chifukwa chake, dihydroxy metal hydroxides ziyenera kugawidwa ngati zokhazikika pa kutentha kwa nthawi yayitali, zomwe zitha kukulitsa nthawi yokhazikika pa kutentha kwa PVC kwa nthawi yayitali. Chifukwa chake, pophatikiza calcium zinc stabilizers, hydrotalcite ndi imodzi mwazinthu zofunika kwambiri zopangira.