Qhov txawv ntawm HPMC E thiab K yog dab tsi?

HPMC (Hydroxypropyl Methylcellulose) yog ib hom cellulose ether siv ntau yam kev siv, suav nrog tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. HPMC yog non-ionic, dej-soluble polymer muab los ntawm cellulose, thiab muaj nyob rau hauv ob hom: HPMC E thiab HPMC K.

HPMC E yog qib qis-viscosity ntawm HPMC, thiab yog siv feem ntau hauv cov ntawv thov tshuaj. Nws yog siv los ua ib qho binder, disintegrant, thiab tshem tawm tus neeg sawv cev hauv cov ntsiav tshuaj, tshuaj ntsiav, thiab granules. Nws kuj yog siv los ua ib tug thickening neeg sawv cev nyob rau hauv syrups, cream, thiab tshuaj pleev. HPMC E yog qib qis viscosity, txhais tau tias nws muaj viscosity tsawg thaum yaj hauv dej. Qhov no ua rau nws zoo tagnrho rau siv hauv kev siv tshuaj, vim nws yooj yim rau sib tov thiab tawg hauv dej.

HPMC K yog qib siab viscosity ntawm HPMC, thiab feem ntau yog siv hauv kev tsim kho thiab kev siv zaub mov. Nws yog siv los ua ib qho kev sib khi, thickener, thiab tshem tawm tus neeg sawv cev hauv cov khoom siv, xws li cov nplais nplaum, grouts, thiab plasters. Nws kuj yog siv los ua tus neeg sawv cev thickening hauv cov khoom noj, xws li jams, jellies, thiab kua ntses. HPMC K yog qib high-viscosity, txhais tau tias nws muaj viscosity siab thaum yaj hauv dej. Qhov no ua rau nws zoo tagnrho rau kev siv hauv kev tsim kho thiab kev siv khoom noj, raws li nws muaj peev xwm muab cov tuab tuab, tuab tuab.

Qhov sib txawv tseem ceeb ntawm HPMC E thiab HPMC K yog viscosity. HPMC E yog qib qis viscosity, txhais tau tias nws muaj viscosity tsawg thaum yaj hauv dej. Qhov no ua rau nws zoo tagnrho rau siv hauv kev siv tshuaj, vim nws yooj yim rau sib tov thiab tawg hauv dej. HPMC K yog qib high-viscosity, txhais tau tias nws muaj viscosity siab thaum yaj hauv dej. Qhov no ua rau nws zoo tagnrho rau kev siv hauv kev tsim kho thiab kev siv khoom noj, raws li nws muaj peev xwm muab cov tuab tuab, tuab tuab.

Ntxiv rau qhov viscosity, HPMC E thiab HPMC K kuj txawv ntawm lawv cov qauv tshuaj. HPMC E muaj qhov hnyav dua molecular dua li HPMC K, uas ua rau nws qis dua viscosity. HPMC K muaj qhov hnyav dua molecular, uas ua rau nws muaj viscosity ntau dua.

Thaum kawg, HPMC E thiab HPMC K kuj txawv ntawm lawv cov solubility. HPMC E yog soluble hauv dej txias, thaum HPMC K yog soluble hauv dej kub. Qhov no ua rau HPMC E zoo tagnrho rau siv hauv kev siv tshuaj, vim nws tuaj yeem sib xyaw tau yooj yim thiab tawg hauv dej txias. HPMC K yog qhov zoo tshaj plaws rau kev siv hauv kev tsim kho thiab kev siv khoom noj, vim nws tuaj yeem sib xyaw tau yooj yim thiab tawg hauv cov dej kub.

Hauv kev xaus, qhov sib txawv tseem ceeb ntawm HPMC E thiab HPMC K yog viscosity. HPMC E yog qib qis-viscosity, thaum HPMC K yog qib siab-viscosity. Tsis tas li ntawd, HPMC E muaj qhov hnyav dua molecular dua li HPMC K, thiab yog soluble hauv dej txias, thaum HPMC K yog soluble hauv dej kub. Cov kev sib txawv no ua rau HPMC E thiab HPMC K zoo tagnrho rau kev siv hauv ntau daim ntawv thov.