Lub Viscosity Index ntawmHydroxyPropyyl Methylcelluloseyog qhov ntsuas tseem ceeb heev. Lub viscosity tsis sawv cev txoj kev huv. Lub viscosity ntawm cellulose hpmc nyob ntawm cov txheej txheem ntau lawm. Hom kev siv sib txawv yuav tsum xaiv cellulose HPMC nrog cov viscosities sib txawv, tsis yog siab dua viscosge ntawm cellulose ntawm cellulose hpmc, zoo dua! Txoj cai yog txoj cai √
Paub txog tswj hwm
1. High-viscosity HydroyPropylenSylulose tsis tuaj yeem tsim cov cellulose heev tsuas yog los ntawm nqus thiab hloov nrog nitrogen. Feem ntau, zus tau tej yam ntawm high-viscosity cellulose hauv Suav teb tsis tau. Txawm li cas los xij, yog tias ib txoj kab kev ua pa oxygen tuaj yeem ntsia hauv lub hwj kais dej viscosity, cov khoom siv viscosity, muaj peev xwm tswj tau artificially.
Siv cov koom nrog cov neeg sawv cev
2. Ib qho ntxiv, xav txog kev hloov cov nitrogen ntawm nitrogen, thiab tib lub sijhawm, nws yog qhov yooj yim tsim cov khoom lag luam high-viscosity tsis muaj teeb meem li cas airtight lub system yog. Ntawm chav kawm, qib ntawm polymerization ntawm lub paj rwb Refined tseem yog qhov tseem ceeb. Yog tias qhov ntawd tsis ua haujlwm, ua nws los ntawm hydrophobic koom nrog. Muaj cov neeg sawv cev hauv tsev hauv qhov no. Dab tsi ntawm cov koom nrog tus neeg sawv cev tau xaiv tau muaj kev cuam tshuam zoo ntawm kev ua haujlwm ntawm cov khoom kawg.
Hydroxypropyl cov ntsiab lus
3. Qhov seem uas muaj oxygen nyob rau hauv reactor ua rau muaj kev cuam tshuam ntawm cellulose thiab txo cov roj ntsha, tab sis cov oxygen yog txwv. Nws tsis yog qhov nyuaj ua kom cov viscosity siab ntev li ntev li cov lwg me me tau rov ua dua tshiab. Txawm li cas los xij, cov dej dej muaj txiaj ntsig tseem muaj feem xyuam nrog cov ntsiab lus ntawm hydroxyprropyl. Qee cov Hoobkas tsuas yog xav kom txo tus nqi thiab tus nqi, thiab tsis kam nce cov ntsiab lus ntawm hydroxypropyl, yog li tsis tuaj yeem ncav rau theem ntawm cov khoom lag luam txawv teb chaws.
Lwm Yam
4. Cov dej khaws cov khoom lag luam muaj kev sib raug zoo nrog cov txheej txheem methylropyl, tab sis rau tag nrho cov txheej txheem ntawm methylrops thiab propylene oxide, thiab kev xav ntawm alkali. Thiab qhov piv txwv ntawm cov dej los kho cov paj rwb txiav txim siab qhov ua tau zoo ntawm cov khoom.
Lub Sijhawm Post: Oct-19-2022