Lub tsev tshwj xeeb hydroxypropyl methyl cellulose kom tsis txhob ya raws nkag mus rau phab ntsa, yuav yog tus nqi ntawm cov dej noo tuaj yeem nyob hauv cov cement cement tsim kev ua haujlwm zoo hauv dej thiab lub luag haujlwm ntawm hydroxypropyl methyl cellulose nyob rau hauv mortar tuaj yeem yog proportional rau viscosity, qhov siab dua qhov viscosity ntawm hydroxypropyl methyl cellulose dej tuav yuav zoo dua.
Thaum cov dej noo ntawm hydroxypropyl methyl cellulose siab dhau lawm, cov dej tuav ntawm hydroxypropyl methyl cellulose yuav poob qis, thiab nws yuav ncaj qha mus rau kev tsim kho ntawm hydroxypropyl methyl cellulose. Peb kuj paub txog tej yam yuav yooj yim dua rau kev ua yuam kev, peb yuav tsum nco ntsoov khaws cia tshiab, peb yuav tau txais cov txiaj ntsig tsis xav tau.
Qhov pom tseeb viscosity yog qhov ntsuas tseem ceeb ntawm hydroxypropyl methyl cellulose. Cov txheej txheem kev ntsuas feem ntau yog ntsuas viscosity rotational, ntsuas capillary viscosity thiab ntsuas viscosity poob.
Yav dhau los, hydroxypropyl methyl cellulose tau txiav txim siab los ntawm kev ntsuas capillary viscosity, siv Uhnscher viscometer. Kev ntsuas kev ntsuas feem ntau yog cov tshuaj aqueous ntawm 2, thiab cov qauv yog: V = Kdt. V yog lub viscosity nyob rau hauv vib nas this, K yog qhov tas li ntawm lub viscometer, D yog qhov ceev ntawm qhov kub thiab txias, thiab T yog lub sij hawm nws yuav siv sij hawm mus rau sab saum toj mus rau hauv qab ntawm lub viscometer nyob rau hauv vib nas this. Txoj kev ua haujlwm no yog qhov nyuaj dua, yog tias muaj cov khoom siv tsis sib haum, nws yooj yim los ua qhov yuam kev, nws nyuaj rau txheeb xyuas qhov zoo ntawm hydroxypropyl methylcellulose.
Qhov teeb meem ntawm lub tsev kua nplaum stratification yog ib qho teeb meem loj uas cov neeg siv khoom ntsib. Ua ntej ntawm tag nrho cov, qhov teeb meem ntawm raw cov ntaub ntawv yuav tsum tau txiav txim siab rau lub tsev kua nplaum stratification. Lub ntsiab yog vim li cas rau lub tsev kua nplaum stratification yog incompatibility ntawm polyvinyl cawv (PVA) thiab hydroxypropyl methylcellulose (HPMC). Qhov thib ob yog vim li cas lub sij hawm sib tov tsis txaus; Tseem muaj lub tsev kua nplaum thickening kev ua tau zoo tsis zoo.
Hauv kev tsim cov kua nplaum, yuav tsum siv tam sim hydroxypropyl methylcellulose (HPMC) vim tias HPMC tsuas yog tawg hauv dej thiab tsis yaj tiag tiag. Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid.
Cov khoom kub soluble, hauv dej txias, tuaj yeem tawg sai sai hauv dej kub, ploj mus rau hauv dej kub, thaum qhov kub thiab txias poob mus rau qhov kub thiab txias, viscosity maj mam tshwm, kom txog thaum tsim cov pob tshab viscous colloid. Hydroxypropyl methylcellulose (HPMC) nyob rau hauv lub tsev cov kua nplaum ntxiv yog pom zoo rau 2-4kg.
Hydroxypropyl methyl cellulose (HPMC) nyob rau hauv lub tsev kua nplaum tshuaj stability, mildew, dej tuav nyhuv yog zoo, thiab tsis cuam tshuam los ntawm PH hloov, viscosity ntawm 100 000 S - 200 000 S yuav siv tau. Tab sis hauv kev tsim khoom tsis yog qhov siab dua qhov viscosity zoo dua, viscosity thiab daim ntawv cog lus lub zog yog qhov sib txawv, qhov siab dua qhov viscosity, lub zog me dua, feem ntau 100,000S viscosity yog qhov tsim nyog.
Post lub sij hawm: Sep-16-2022