Lub viscosity Performance index ntawm hydroxypropyl methylcellulose yog qhov ntsuas tseem ceeb heev.Lub viscosity tsis sawv cev rau purity.Lub viscosity ntawm cellulose HPMC nyob ntawm cov txheej txheem ntau lawm.Kev siv sib txawv yuav tsum xaiv cellulose HPMC nrog cov viscosities sib txawv, tsis yog qhov siab dua ntawm cellulose HPMC, qhov zoo dua!Dab tsi yog qhov tsim nyog yog.
viscosity tswj
1. Hauv kev tsim cov high-viscosity hydroxypropyl methylcellulose, tsuas yog nqus thiab hloov nitrogen tsis tuaj yeem tsim cov cellulose siab heev.Feem ntau, kev tsim cov high-viscosity cellulose hauv Suav teb tsis tuaj yeem tswj tau.Txawm li cas los xij, yog tias lub ntsuas pa oxygen tuaj yeem ntsia tau rau hauv lub hwj, qhov tsim ntawm nws cov viscosity tuaj yeem tswj tau.
Kev siv tus neeg sawv cev koom haum
2. Tsis tas li ntawd, xav txog kev hloov pauv ceev ntawm nitrogen, nws yog ib qho yooj yim los tsim cov khoom siv high-viscosity txawm tias lub kaw lus airtight zoo li cas.Ntawm chav kawm, cov degree ntawm polymerization ntawm refined paj rwb kuj tseem ceeb heev.Yog tias qhov ntawd tsis ua haujlwm, ces ua nrog hydrophobic koom haum.Muaj cov neeg sawv cev koom nrog hauv cheeb tsam no hauv Suav teb.Dab tsi ntawm koom haum tus neeg sawv cev xaiv muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm cov khoom kawg.
Cov ntsiab lus ntawm Hydroxypropyl
3. Cov pa oxygen nyob rau hauv lub reactor ua rau degradation ntawm cellulose thiab qis molecular hnyav.Txawm li cas los xij, yog tias cov pa oxygen seem raug txwv, tsuav yog cov molecules tawg tau txuas dua, nws tsis yooj yim los ua kom muaj viscosity siab.Txawm li cas los xij, tus nqi saturation muaj ntau ua nrog cov ntsiab lus ntawm hydroxypropyl.Qee lub tuam txhab tsuas yog xav txo tus nqi thiab tus nqi, tab sis tsis kam ua kom cov ntsiab lus ntawm hydroxypropyl nce ntxiv, yog li qhov zoo tsis tuaj yeem ncav cuag qib ntawm cov khoom txawv teb chaws zoo sib xws.
lwm yam
4. Cov dej tuav tus nqi ntawm cov khoom muaj kev sib raug zoo nrog hydroxypropyl, tab sis nws kuj txiav txim siab nws cov dej tuav tus nqi, alkalization nyhuv, piv ntawm methyl chloride thiab propylene oxide, thiab alkali concentration rau tag nrho cov txheej txheem tshuaj tiv thaiv.Ob qhov sib piv ntawm cov dej thiab cov paj rwb refined txiav txim siab qhov ua tau zoo ntawm cov khoom.
Post lub sij hawm: Apr-03-2023