Cov teebmeem ntawm qhov kub thiab txias ntawm dej tuav ntawm Cellulose Ether

Cov dej tuav cov khoom ntawm cellulose ethers, suav nrog carboxymethyl cellulose (CMC) thiab hydroxyethyl cellulose (HEC), tuaj yeem cuam tshuam los ntawm qhov kub thiab txias. Nov yog cov teebmeem ntawm qhov kub thiab txias ntawm cov dej tuav ntawm cellulose ethers:

1. Viscosity: Thaum kub dua, viscosity ntawm cellulose ether daws txo. Raws li viscosity txo qis, lub peev xwm ntawm cellulose ether los tsim cov gel thickened thiab khaws cov dej tsawg. Qhov no tuaj yeem ua rau txo cov dej khaws cia ntawm qhov kub siab.
2. Solubility: Kub tuaj yeem cuam tshuam rau solubility ntawm cellulose ethers hauv dej. Qee cov cellulose ethers tuaj yeem txo cov solubility ntawm qhov kub siab dua, ua rau txo qis cov dej tuav. Txawm li cas los xij, tus cwj pwm solubility tuaj yeem sib txawv nyob ntawm seb hom thiab qib ntawm cellulose ether.
3. Dej Rate: Cov kub siab tuaj yeem ua kom cov dej ntawm cov cellulose ethers hauv dej. Qhov no tej zaum yuav pib ua kom cov dej tuav tau raws li cov cellulose ether swells thiab tsim cov viscous gel. Txawm li cas los xij, qhov ntev ntev ntawm qhov kub siab tuaj yeem ua rau muaj kev puas tsuaj ntxov ntxov lossis tawg ntawm cov qauv gel, uas ua rau txo cov dej tuav lub sijhawm.
4. evaporation: Qhov kub siab tuaj yeem nce tus nqi ntawm cov dej evaporation los ntawm cellulose ether daws los yog mortar sib tov. Qhov kev ua kom nrawm nrawm no tuaj yeem ua rau cov dej hauv lub cev tau nrawm dua, tuaj yeem txo cov txiaj ntsig ntawm cov dej khaws cia ntxiv xws li cellulose ethers.
5. Daim Ntawv Thov Cov Txheej Txheem: Kub kuj tuaj yeem cuam tshuam rau daim ntawv thov thiab kev ua haujlwm ntawm cov khoom siv cellulose ether. Piv txwv li, nyob rau hauv kev tsim kho daim ntawv thov xws li pobzeb adhesives los yog cement-based mortars, qhov kub thiab txias yuav ua rau kom cov txheej txheem los yog kho, cuam tshuam rau kev ua haujlwm thiab kev ua haujlwm ntawm cov khoom.
6. Thermal Stability: Cellulose ethers feem ntau pom zoo thermal stability nyob rau hauv ntau qhov kub thiab txias. Txawm li cas los xij, qhov ntev ntev ntawm qhov kub thiab txias tuaj yeem ua rau degradation los yog decomposition ntawm polymer chains, ua rau poob ntawm cov khoom tuav dej. Kev khaws cia thiab tuav kom zoo yog qhov tseem ceeb los khaws kev ncaj ncees thiab kev ua haujlwm ntawm cellulose ethers.

Thaum qhov kub thiab txias tuaj yeem cuam tshuam cov dej tuav cov khoom ntawm cellulose ethers, cov teebmeem tshwj xeeb yuav txawv nyob ntawm seb yam xws li hom cellulose ether, kev daws teeb meem, kev siv txoj kev, thiab ib puag ncig. Nws yog ib qho tseem ceeb uas yuav tau xav txog cov xwm txheej no thaum tsim los yog siv cov khoom siv cellulose ether los xyuas kom pom kev ua haujlwm zoo nyob rau hauv qhov sib txawv kub.