Xaiv HPMC viscosity thaum ua cov zaub mov putty qhuav-mixeded cug?

Methyl cellulose mc thiab hydroxypropal methylropy cellulose (HPMC) muaj cov tshuaj uas ruaj khov, thiab tsis muaj kev cuam tshuam los ntawm kev hloov pauv hauv PH nqi. Nws tsis yog tias cov viscosity ntau dua, qhov zoo dua. Lub viscosity yog inversely proportional rau cov nyiaj txhiv zog. Qhov siab dua viscosity, tus me dua lub zog. Kev tsim cov khoom siv putty feem ntau ntawm 50,000 thiab 100,000 viscosities. Sab nraud thermal rwb thaiv tsev qhuav-sib nraus yog qhov tsim nyog dua li 15-20 10,000 viscosity, feem ntau yog kom txo tau cov cement. Lwm cov nyhuv yog tias cov xis ntshiab muaj lub sijhawm sib sau, thaum nws xav tau cured thiab dej yuav tsum tau khaws cia noo. Vim tias cov dej khaws cov nyhuv ntawm cellulose, cov dej yuav tsum tau lav los ntawm cov dej cellule ntawm cellulose tuaj yeem ua tiav tsis muaj txij nkawm.

Hais txog qhov zoo ntawm cellulose, feem ntau yog viscosity, nws tuaj yeem kuaj nrog lub puscoseter sib hloov, thiab tseem yuav muab piv nrog txoj kev yooj yim. Thaum muab piv, noj 1 gram ntawm cellulose nrog tib viscosity, ntxiv rau hauv ib lub khob pov tseg, muaj qhov zoo dua qhov tau zoo dua, thiab muaj cov nyhuv zoo dua. Qhov zoo dua cov transparency, qhov tsis tshua muaj kev cuam tshuam.

Carboxymethyl cellulose cmc thiab sodium carboxymethyl hmoov (CMS) yog tus tseem ceeb. Lawv tau siv hauv cov hmoov qis uas muaj cov hmoov nplaum rau sab hauv phab ntsa. Siv hauv insulating qhuav sib xyaw. Vim tias cov cellulose no yuav hnov ​​mob nrog cov cement, calcium txiv qaub hmoov, gypsum hmoov, thiab inorganic binders.

Coob leej xav tias cov cellulos no yog alkaline. Feem ntau, cov cement thiab txiv qaub calcium hmoov tseem yog alkaline, thiab lawv xav tias lawv tuaj yeem siv ua ke. Txawm li cas los xij, CMC thiab CMS tsis yog ib qho. Cov tshuaj choloroacetic siv hauv cov txheej txheem ntau lawm yog acidic. Cov tshuaj uas seem nyob hauv cov txheej txheem muaj mob nrog cov cement thiab txiv qaub calcium hmoov, yog li lawv tsis tuaj yeem ua ke. Ntau cov tuam txhab tau raug kev txom nyem vim qhov no, yog li yuav tsum tau them nyiaj.