Qhov viscosity yog ib qho tseem ceeb rau kev ua haujlwm ntawm hydroxypropyl methylcellulose (HPMC). HPMC siv dav hauv ntau yam lag luam vim nws cov polymer uas yaj tau hauv dej, tsis muaj ionic, tsis muaj tshuaj lom thiab lwm yam khoom. Nws muaj cov yam ntxwv zoo heev rau kev tsim zaj duab xis, ua kom tuab thiab nplaum, ua rau nws yog qhov kev xaiv zoo rau ntau yam kev siv.
Viscosity yog qhov ntsuas ntawm cov kua dej sab hauv tsis kam rau kev ntws. Hauv lwm lo lus, nws ntsuas qhov tuab lossis nyias ntawm cov kua dej. Viscosity yog ib qho tseem ceeb rau kev ua tau zoo ntawm HPMC vim nws cuam tshuam rau cov yam ntxwv ntws ntawm cov tshuaj. Qhov siab dua qhov viscosity, qhov tuab dua cov tshuaj thiab qhov qeeb dua nws ntws. Viscosity muaj kev cuam tshuam ncaj qha rau daim ntawv thov thiab kev ua haujlwm ntawm HPMC.
Ib qho ntawm cov ntawv thov tseem ceeb ntawm HPMC yog ua cov khoom ua kom tuab. Vim nws qhov hnyav molecular siab thiab cov khoom sib txuas hydrogen, HPMC tsim cov khoom zoo li gel tuab thaum yaj hauv dej. Qhov viscosity ntawm HPMC yog qhov tseem ceeb hauv kev txiav txim siab qhov sib xws ntawm cov tshuaj. Qhov viscosity siab dua, qhov tuab dua cov tshuaj. Cov yam ntxwv no ua rau nws zoo tagnrho rau kev siv cov khoom tuab hauv cov khoom xws li xim, txheej thiab nplaum.
Lwm daim ntawv thov tseem ceeb ntawm HPMC yog tshuaj. Nws yog siv ua cov khoom siv hauv ntau yam qauv xws li ntsiav tshuaj, tshuaj ntsiav thiab tshuaj pleev. Qhov viscosity ntawm HPMC ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom no. Nws cuam tshuam rau kev ntws, kev sib xws thiab kev ruaj khov ntawm cov qauv. Qhov viscosity kom raug yog qhov yuav tsum tau ua kom ntseeg tau tias cov khoom yooj yim rau kev tuav thiab tuaj yeem muab tshuaj kom raug. HPMC muaj viscosity qis thaum yaj hauv dej, ua rau nws zoo tagnrho rau kev npaj cov tshuaj thiab cov tshuaj ncua.
Qhov viscosity kuj tseem ceeb heev rau kev ua haujlwm ntawm HPMC rau kev lag luam kev tsim kho. Nws yog siv dav ua cov khoom siv tuab thiab cov khoom sib txuas hauv cov ntaub ntawv cement xws li mortar thiab grout. Qhov viscosity ntawm HPMC txiav txim siab qhov ua tau thiab yooj yim ntawm kev siv cov ntaub ntawv no. Qhov viscosity kom raug yog qhov yuav tsum tau ua kom ntseeg tau tias cov khoom siv tuaj yeem siv tau yooj yim thiab kis tau sib npaug. HPMC muaj qhov ruaj khov viscosity zoo heev uas ua rau nws zoo tagnrho rau kev siv hauv kev tsim kho.
Qhov viscosity kuj cuam tshuam rau lub sijhawm txee ntawm cov khoom HPMC. Qhov viscosity ntawm HPMC tuaj yeem nce lossis txo qis vim muaj ntau yam xws li kub, pH thiab concentration. Kev hloov pauv ntawm viscosity tuaj yeem cuam tshuam rau cov khoom thiab kev ua haujlwm ntawm cov khoom, ua rau cov khoom tsis ua haujlwm lossis txo qis kev ua haujlwm. Yog li ntawd, qhov viscosity ntawm cov khoom siv HPMC yuav tsum tau tswj kom ntseeg tau tias lawv ruaj khov thiab ua haujlwm tau zoo.
Qhov viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm hydroxypropylmethylcellulose (HPMC). Nws cuam tshuam rau cov yam ntxwv ntws, tuab thiab kev ua haujlwm ntawm cov khoom HPMC. Qhov viscosity kom raug yog qhov yuav tsum tau ua kom ntseeg tau tias cov khoom yooj yim siv thiab ntsuas, muaj kev ruaj khov zoo thiab ua haujlwm tau zoo dhau sijhawm. HPMC muaj kev ruaj khov viscosity zoo heev, uas ua rau nws yog qhov kev xaiv zoo rau ntau yam kev siv hauv kev lag luam xws li tshuaj, kev tsim kho thiab kev saib xyuas tus kheej.
Lub sijhawm tshaj tawm: Cuaj hlis-07-2023