Cov khoom ntawm HPMC (HydroxyPropyyl methyl cellulose)

HydroxyPropyyl methylcellulose (HPMC) yog ib nrab hluavtaws polymer muab tau los ntawm cellulose. Nws muaj ob peb lub zog uas ua rau nws muaj txiaj ntsig hauv ntau yam kev siv thoob plaws kev lag luam. Nov yog qee qhov tseem ceeb ntawm HPMC:

1. Dej solubility: HPMC yog soluble hauv dej txias, kev ua kom meej, viscous kev daws teeb meem. Solubility sib txawv nyob ntawm cov qib hloov pauv (DS) thiab qhov hnyav molecular ntawm cov polymer.
2. Thermal Stability: HPMC cov khoom pov thawj zoo ua kom zoo ua kom ruaj khov, tuav nws cov khoom dhau ntawm ntau yam kev kub. Nws tuaj yeem tiv thaiv cov kev ua haujlwm tau ntsib hauv ntau qhov kev lag luam, suav nrog kev siv tshuaj thiab chaw siv khoom.
3. Zaj duab xis tsim: HPMC muaj zaj duab xis-ua yeeb yaj kiab, tso cai rau nws los ua cov yeeb yaj kiab ntshiab thiab hloov tau thaum ziab. Cov cuab yeej no tau txais txiaj ntsig zoo hauv lub cev muaj koob yees duab, qhov twg HPMC yog siv los ua cov ntsiav tshuaj thiab cov tsiav tshuaj rau cov tshuaj tso tawm.
4. Lub peev xwm thickening: HPMC ua raws li tus neeg sawv cev ua kom tuab hauv cov kua aqueous, nce viscosity thiab txhim kho cov qauv ntawm cov qauv. Nws yog feem ntau siv rau cov xim tha xim, cov nplaum, tshuaj pleev ib ce, thiab cov khoom noj khoom haus kom ua tiav qhov xav tau.
5. Rheology kev hloov kho: HPMC ua haujlwm ua cov rheology hloov kho, muaj kev cuam tshuam kev coj tus cwj pwm thiab viscosity ntawm cov kev daws teeb meem. Nws ua cov yeeb yam pseudopastic tus cwj pwm, txhais tau tias nws viscosity txo qis nyob rau hauv shear kev nyuaj siab, cia rau kev thov kom yooj yim dua thiab kis tau yooj yim dua.
6. Dej khaws cia: HPMC muaj cov dej ua haujlwm zoo heev, pab tiv thaiv kom tsis txhob muaj kev ua kom ya raws. Cov cuab yeej no yog muaj txiaj ntsig zoo rau cov khoom siv xws li Mortars thiab cov ris tsho thiab cov neeg HPMC txhim kho cov haujlwm ua haujlwm thiab cov nplaum.
7. Tshuaj lom neeg ruaj khov: HPMC yog qhov tsis ruaj khov nyob rau hauv ntau hom pheeb suab, ua rau nws haum rau siv nyob rau ntau yam qauv. Nws yog resrant rau microbial degradation thiab tsis yog choj kev hloov tshuaj tseem ceeb nyob rau hauv ib txwm muaj tej yam kev cia.
8. Kev sib txuam: HPMC tau sib haum nrog ntau yam ntawm lwm cov ntaub ntawv, suav nrog cov polymers, surfactants, thiab ntxiv. Nws tuaj yeem yooj yim incorporated rau hauv cov qauv uas tsis ua rau muaj kev sib raug zoo lossis cuam tshuam rau kev ua tau zoo ntawm lwm yam khoom xyaw.
9. Nonionic Xwm: HPMC yog cov neeg tsis muaj ntaub ntawv ntawm lub ntsiab lus no, lub ntsiab lus nws tsis nqa tus nqi hluav taws xob tsis nqa hluav taws xob. Cov cuab yeej no pab txhawb rau nws cov versatility thiab haum nrog sib txawv ntawm cov qauv thiab cov khoom xyaw.

HydroxyPropyyl methylcellose (HPMC) muaj ib qho kev sib xyaw ua ke ntawm cov khoom uas ua rau nws muaj txiaj ntsig ntxiv hauv ntau yam kev lag luam. Nws cov solubility, thermal stability, ua yeeb yaj kiab, thickening cov khoom, thiab sib zog nrog lwm cov ntaub ntawv ua nws haum rau ntau cov ntawv thov.