Dab tsi yog Chemical Properties of Hypromellose?

Hydroxypropyl Methylcellulose (HPMC), tseem hu ua Hypromellose, yog ib qho hluavtaws polymer muab los ntawm cellulose. Nws cov khoom siv tshuaj muaj xws li:

1. Solubility: HPMC yog soluble hauv dej thiab tsim cov tshuaj ntshiab thaum tov nrog dej. Kev solubility ntawm HPMC nyob ntawm nws qib kev hloov pauv (DS) thiab qib viscosity.
2. Viscosity: HPMC muaj nyob rau hauv ntau qib viscosity, xws li qis mus rau siab viscosity. Lub viscosity ntawm HPMC nyob ntawm nws qhov hnyav molecular, qib ntawm kev hloov pauv, thiab qhov concentration.
3. Stability: HPMC yog ruaj khov nyob rau hauv ib txwm kub thiab pH. Nws yog resistant rau microbial degradation thiab tsis decompose yooj yim.
4. Cov khoom siv hluav taws xob: HPMC muaj qhov zoo thermal stability thiab tuaj yeem tiv taus kub txog 200 ° C yam tsis muaj decomposing.
5. Kev ua haujlwm saum npoo: HPMC muaj qhov ua haujlwm saum npoo vim nws qhov polar xwm, uas ua rau nws muaj txiaj ntsig zoo li dispersant thiab emulsifier hauv ntau daim ntawv thov.
6. Hygroscopicity: HPMC yog hygroscopic, txhais tau tias nws muaj lub siab nyiam nqus dej los ntawm ib puag ncig. Cov cuab yeej no ua rau nws muaj txiaj ntsig zoo ua tus neeg saib xyuas dej hauv ntau daim ntawv thov.
7. Tshuaj reactivity: HPMC yog tshuaj inert thiab tsis hnov ​​​​mob nrog lwm yam tshuaj. Txawm li cas los xij, nws tuaj yeem tsim cov ntawv cog lus hydrogen nrog lwm cov polar molecules, uas ua rau nws muaj txiaj ntsig zoo li thickener, binder, thiab zaj duab xis-yav dhau los hauv ntau daim ntawv thov.

Hauv cov ntsiab lus,HPMCmuaj ntau yam tshuaj lom neeg uas ua rau nws muaj ntau yam thiab muaj txiaj ntsig zoo polymer hauv ntau qhov kev lag luam, suav nrog tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Nws solubility, viscosity, stability, thermal zog, deg kev ua si, hygroscopicity, thiab tshuaj reactivity ua rau nws haum rau ntau yam kev siv.