Hydroxypropyl methylcellulose yog sivnrog viscosity ntawm 100,000 feem ntau yog txaus nyob rau hauv putty hmoov, thaum mortar muaj ib tug kuj yuav tsum tau ntau dua rau viscosity, yog li viscosity ntawm 150,000 yuav tsum tau xaiv kom zoo dua. Qhov tseem ceeb tshaj plaws ua haujlwm ntawmHydroxypropyl methylcellulose yog tsim los ntawm cov tshuajyog dej tuav, ua raws li thickening. Yog li ntawd, nyob rau hauv putty hmoov, tsuav yog cov dej tuav tau tiav, qhov qis viscosity kuj tau txais. Feem ntau hais lus, qhov viscosity siab dua, qhov dej tuav tau zoo dua, tab sis thaum lub viscosity siab tshaj 100,000, qhov cuam tshuam ntawm viscosity ntawm cov dej tuav tsis yog qhov tseem ceeb.
Hydroxypropyl methylcellulose yog sivFeem ntau muab faib ua pawg hauv qab no raws li viscosity:
1. Tsawg viscosity: 400 viscosity cellulose, feem ntau yog siv rau tus kheej-leveling mortar.
Tsis tshua muaj viscosity, zoo fluidity, tom qab ntxiv nws yuav tswj cov dej ntws tawm, dej seepage tsis pom tseeb, shrinkage me me, tawg yog txo, thiab nws kuj tuaj yeem tiv taus sedimentation, txhim khu fluidity thiab pumpability.
2. Qhov nruab nrab-tsawg viscosity: 20,000-50,000 viscosity cellulose, feem ntau yog siv rau cov khoom gypsum thiab cov tshuaj tua kab mob.
Tsawg viscosity, dej tuav, kev tsim kho zoo, tsis muaj dej ntxiv.
3. Nruab nrab viscosity: 75,000-100,000 viscosity cellulose, feem ntau yog siv rau sab hauv thiab sab nrauv phab ntsa putty.
Nruab nrab viscosity, dej tuav zoo, kev tsim kho zoo thiab dai khoom
4. High viscosity: 150,000-200,000, feem ntau yog siv rau polystyrene particle rwb thaiv tsev mortar kua nplaum hmoov thiab vitrified micro-bead rwb thaiv tsev mortar. High viscosity, siab dej tuav, mortar tsis yooj yim rau poob, ntws, txhim kho kev tsim kho.
Feem ntau hais lus, qhov siab dua qhov viscosity, qhov dej tuav tau zoo dua. Yog li ntawd, ntau tus neeg muas zaub yuav xaiv siv nruab nrab-viscosity cellulose (75,000-100,000) es tsis txhob nruab nrab-tsawg viscosity cellulose (20,000-50,000) kom txo cov nyiaj ntxiv thiab yog li tswj cov nqi.
Hydroxypropyl methylcellulose (HPMC)yog ib tug semisynthetic polymer uas feem ntau siv nyob rau hauv ntau yam lag luam, nrog rau kev tsim kho, tshuaj, thiab khoom noj khoom haus. Lub viscosity ntawm HPMC yog ib qho khoom tseem ceeb uas txiav txim siab nws qhov kev ua tau zoo hauv ntau daim ntawv thov.
Lub viscosity ntawm HPMC yog cuam tshuam los ntawm cov yam ntxwv xws li qib kev hloov pauv (DS), qhov hnyav molecular, thiab qhov siab ntawm HPMC cov tshuaj. Feem ntau, raws li qib kev hloov pauv thiab qhov hnyav molecular ntawm HPMC nce, yog li nws cov viscosity.
HPMC muaj nyob rau hauv ntau qib viscosity, feem ntau ntsuas raws li nws "molecular hnyav" lossis "methoxyl cov ntsiab lus." Lub viscosity ntawm HPMC tuaj yeem hloov kho los ntawm kev xaiv cov qib tsim nyog lossis los ntawm kev kho qhov concentration ntawm HPMC cov tshuaj.
Hauv kev tsim kho, HPMC nrog cov viscosity siab dua feem ntau yog siv los txhim kho kev ua haujlwm thiab dej tuav ntawm cov khoom siv cement. Hauv kev lag luam tshuaj, viscosity yog qhov tseem ceeb hauv kev tswj xyuas qhov tso tawm ntawm cov khoom xyaw nquag hauv cov tshuaj formulations.
Yog li ntawd, kev nkag siab txog cov viscosity ntawm hydroxypropyl methylcellulose yog qhov tseem ceeb rau kev xaiv cov qib zoo rau cov kev siv tshwj xeeb thiab ua kom ntseeg tau cov yam ntxwv ua tau zoo.
Post lub sij hawm: May-30-2024