Cellulose ether feem ntau yog ib qho khoom tseem ceeb hauv cov tshuaj khib nyiab qhuav.Vim hais tias nws yog ib qho tseem ceeb ntawm cov dej tuav tus neeg sawv cev nrog cov dej tuav zoo heev.Cov khoom tuav dej no tuaj yeem tiv thaiv cov dej hauv cov khib nyiab ntub dej los ntawm evaporating ntxov ntxov los yog raug absorbed los ntawm lub substrate, ncua lub sij hawm ua hauj lwm ntawm cov mortar ntub dej, xyuas kom meej tias cov cement yog tag nrho hydrated, thiab yog li thaum kawg xyuas kom meej lub mechanical zog ntawm lub mortar, uas. tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau kev tsim cov mortars nyias (xws li plastering mortars) thiab mortars nyob rau hauv cov ntaub ntawv absorbent heev (xws li aerated qhob blocks), kub thiab qhuav.
Cov dej tuav cov cuab yeej ntawm cellulose muaj feem xyuam nrog nws cov viscosity.Qhov siab dua qhov viscosity ntawm cellulose ether, qhov zoo dua cov dej tuav kev ua haujlwm.Viscosity yog qhov tseem ceeb ntawm kev ua haujlwm MC.Tam sim no, cov tuam txhab MC sib txawv siv cov kev sib txawv thiab cov cuab yeej siv los ntsuas qhov viscosity ntawm MC, thiab cov hau kev tseem ceeb yog Haake Rotovisko, Hoppler, Ubbelohde thiab Brookfield.Rau tib yam khoom, cov txiaj ntsig viscosity ntsuas los ntawm ntau txoj kev sib txawv heev, thiab qee qhov sib txawv txawm tias exponentially.Yog li ntawd, thaum sib piv viscosities, nws yog ib qho tseem ceeb uas yuav tau ua li ntawd ntawm tib txoj kev sim, xws li kub, rotor, thiab lwm yam.
Feem ntau hais lus, qhov siab dua qhov viscosity, qhov zoo dua cov dej tuav.Txawm li cas los xij, qhov siab dua qhov viscosity, siab dua qhov hnyav molecular ntawm MC thiab qhov sib thooj hauv nws cov solubility, uas muaj qhov tsis zoo rau lub zog thiab kev tsim kho ntawm cov mortar.Qhov siab dua qhov viscosity, qhov pom tseeb dua cov nyhuv thickening ntawm cov tshuaj khib.Qhov siab dua qhov viscosity, cov nplaum nplaum ntub dej yuav yog, ob qho tib si hauv kev tsim kho, raws li pom los ntawm cov nplaum nplaum nplaum thiab qhov siab adhesion rau lub substrate.Txawm li cas los xij, nws tsis pab ntau los ua kom lub zog ntawm cov khoom ntub dej nws tus kheej.Thaum ob qho tib si kev tsim kho, nws qhia tau hais tias qhov kev ua haujlwm tiv thaiv sagging tsis pom tseeb.Ntawm qhov tsis sib xws, qee qhov qis mus rau nruab nrab viscosity tab sis hloov kho methyl cellulose ethers muaj kev ua tau zoo hauv kev txhim kho lub zog ntawm cov khoom ntub dej.
Lub sij hawm xa tuaj: Mar-10-2022