Cellulose ether test Method BROOKFIELD RVT

Brookfield RVT yog ib txoj hauv kev siv los ntsuas qhov viscosity ntawm cellulose ethers.Cellulose ethers yog cov dej-soluble polymers uas tau siv dav hauv ntau daim ntawv thov, suav nrog kev lag luam tshuaj, zaub mov, thiab kev lag luam tu tus kheej.Lub viscosity ntawm cellulose ethers yog ib qho tseem ceeb parameter uas cuam tshuam rau lawv cov kev ua tau zoo nyob rau hauv txawv formulations.Txoj kev Brookfield RVT ntsuas qhov viscosity ntawm cellulose ethers los ntawm kev txiav txim siab lawv cov kev tiv thaiv kom ntws raws li kev siv shear stress.

Nov yog cov kauj ruam rau kev ua Brookfield RVT kuaj rau cellulose ethers:

1. Kev Npaj Qauv: Npaj 2% kev daws ntawm cellulose ether hauv dej.Ntsuas qhov xav tau ntawm cellulose ether thiab ntxiv rau hauv lub thawv nrog cov dej xav tau.Sib tov cov tshuaj kom huv si siv cov sib nqus stirrer kom txog thaum cellulose ether tawg tag nrho.
2. Kev Teeb Khoom: Teeb tsa Brookfield RVT ntsuas raws li cov chaw tsim khoom cov lus qhia.Txuas qhov tsim nyog spindle rau viscometer thiab kho qhov nrawm rau qhov xav tau.Qhov pom zoo spindle thiab ceev ceev sib txawv nyob ntawm seb qhov tshwj xeeb cellulose ether raug kuaj.
3. Calibration: Calibrate cov cuab yeej siv tus qauv siv kua.Lub calibration xyuas kom meej tias qhov ntsuas tau ua haujlwm zoo thiab muab cov viscosity nyeem tau raug.
4. Kev Ntsuas: Muab cov qauv npaj rau hauv tus qauv tuav thiab pib lub viscometer.Ntxig lub spindle rau hauv cov qauv thiab cia nws sib npaug rau 30 vib nas this.Sau cov ntawv nyeem thawj zaug ntawm viscometer zaub.

Ua kom qhov ceev ntawm lub spindle maj mam, thiab sau cov viscosity nyeem ntawv ntawm ib ntus.Cov kev ntsuam xyuas pom zoo sib txawv nyob ntawm seb qhov tshwj xeeb ntawm cov cellulose ether raug kuaj, tab sis qhov sib txawv yog 0.1-100 rpm.Qhov kev sim yuav tsum tau txuas ntxiv mus txog rau thaum qhov siab tshaj plaws tau mus txog, thiab muaj tus naj npawb txaus ntawm kev nyeem ntawv tau raug coj los txiav txim qhov viscosity profile ntawm cov qauv.

5. Kev suav: xam cov viscosity ntawm cellulose ether los ntawm qhov nruab nrab ntawm cov viscosity nyeem ntawm txhua qhov ceev.Lub viscosity yog qhia nyob rau hauv units ntawm centipoise (cP).
6. Kev Ntsuam Xyuas: Sib piv cov viscosity ntawm cellulose ether rau lub hom phiaj viscosity ntau teev rau daim ntawv thov npaj.Lub viscosity tuaj yeem hloov kho los ntawm kev hloov cov concentration lossis qib ntawm cellulose ether.

Hauv cov ntsiab lus, Brookfield RVT txoj kev yog ib txoj hauv kev txhim khu kev qha thiab dav siv los kuaj cov viscosity ntawm cellulose ethers.Txoj kev no kuj yooj yim thiab muaj peev xwm muab tau cov ntaub ntawv tseem ceeb rau formulation thiab optimizing ntau formulations.Nws yog ib qho tseem ceeb uas yuav tau ua raws li cov chaw tsim khoom cov lus qhia thiab siv cov chaw tsim nyog thiab ntxaiv rau qhov tshwj xeeb cellulose ether raug kuaj.