Dab tsi yog qhov viscosity ntawm hydroxypropyl methylcellulose hpmc?

Putty hmoov rau sab hauv phab ntsa feem ntau muaj viscosity ntawm 100,000. Cov cement mortar muaj kev xav tau ntau dua rau kev hloov kho, thiab cov viscosity ntawm 150,000 yog ib qho yooj yim siv. Tsis tas li ntawd, lub luag haujlwm tseem ceeb tshaj plaws ntawm HPMC yog kaw dej, ua raws li kev ua kom tuab. Hauv cov hmoov putty, yog tias cov dej tuav tau zoo thiab cov viscosity tsawg (7-80,000), nws tuaj yeem muaj cov viscosity siab dua thiab cov dej tuav tau zoo dua. Thaum lub viscosity siab tshaj 100,000, lub viscosity muaj me ntsis cuam tshuam rau cov dej tuav.

Dab tsi yog qhov tseem ceeb ntawmHPMC nyob rau hauv putty hmoov, thiab seb organic chemistry tshwm sim?

HPMC plays peb lub luag haujlwm ntawm thickening, dej tuav thiab kev tsim kho hauv cov hmoov putty.

Thickening: Methylcellulose tuaj yeem ua kom pom tseeb nrog cov dej ntws, cov kev daws teeb meem kom muaj kev sib luag thiab ua haujlwm zoo ib yam thiab tiv thaiv kev ntws ntws.

Kev tuav dej: Sab hauv phab ntsa hmoov dries maj mam, thiab ntxiv calcium txiv qaub yog xav txog kev siv dej.

Kev tsim kho engineering: Methyl cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj cov qauv zoo heev.

HPMC tsis koom nrog txhua qhov kev hloov tshuaj lom neeg tab sis tsuas yog hauv kev ntxiv. Putty hmoov, ntawm phab ntsa, yog cov tshuaj hloov pauv, vim tias muaj cov tshuaj lom neeg hloov pauv tshiab, cov hmoov putty tawm ntawm phab ntsa, zom cov hmoov, thiab rov siv dua vim tias muaj cov tshuaj tshiab (calcium carbonate) tau tsim.

Cov ntsiab lus tseem ceeb ntawm calcium ya tshauv yog: Ca(oh)2, Cao thiab ib qho me me ntawm Caco3 tebchaw, Caoh2oCa(oh)2-Ca(oh)2caco3h2o txiv qaub tuaj yeem hloov mus ua calcium bicarbonate hauv dej thiab roj, thaum mpc yog tsuas yog dej soluble Calcium ya tshauv yog ib qho kev xav muaj zog, uas nws tus kheej tsis koom nrog kev xav.

Dab tsi yuav tsum tau them sai sai rau hauv kev siv tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?

Lub viscosity ntawm HPMC yog inversely proportional rau kub, nyob rau hauv lwm yam lus, viscosity nce nrog txo kub. Lub viscosity ntawm cov khoom, lub viscosity ntawm cov khoom txhais tau hais tias nws 2% tov yog nyob rau ntawm ib tug kub ntawm 20 degrees Celsius, thiab cov kev ntsuam xyuas.

Hauv cov ntawv thov tshwj xeeb, kev saib xyuas yuav tsum tau them rau cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, thiab nws tau pom zoo kom siv qis viscosity hauv lub caij ntuj no. Txwv tsis pub, viscosity tsawg, viscosity ntawm cellulose yuav nce, thiab khawb yuav hnyav.

Nruab nrab viscosity: 75000-100000 haum rau putty hmoov
Yog vim li cas: tuav dej zoo

High viscosity: 150000-200000 yog tsim rau polystyrene particle rwb thaiv tsev mortar thiab inorganic rwb thaiv tsev mortar.
Yog vim li cas: siab viscosity, nyuaj tshem tawm ntawm cement mortar, poob ntawm gloss, txhim kho kev tsim kho.