HydroxyPropyyl methylulose, 28-30% methoxyl, 7-12% Hydroxypropyl

Cov kev qhia tshwj xeeb "28-30% methoxyl" thiab "7-12% hydroxypropyl" xa mus rau qib hloov chaw hauvHydroxyPropyyl Methylcellulose(HPMC). Cov txiaj ntsig tseem ceeb qhia tau raws li qhov uas tus thawj cellulose polymer tau raug hloov kho methoxyl thiab hydroxyprodropyl.

1. 28-30% methoxyl:
   • Qhov no qhia tau tias, nyob rau nruab nrab, 28-30% ntawm cov pawg hydroxyl ntawm lub cellulose molecule tau hloov pauv nrog methoxyl pawg. Metoxyl pab pawg (-och3) tau qhia kom nce hydrophobicity ntawm cov polymer.
2. 7-12% Hydroxypropyl:
   • Qhov no qhia tau tias, nyob rau nruab nrab, 7-12% ntawm cov pawg hydroxyl ntawm lub cellulose molecule tau raug hloov nrog hydroxyproplo. HydroxyPropyl pawg (-och2Chohch3) tau qhia los txhim kho cov dej solubility thiab hloov lwm yam siv tshuaj thiab tshuaj lom neeg ntawm cov polymer.

Cov qib ntawm cov neeg hloov chaw rau cov khoom ntawm HPMC thiab nws cov kev ua tau zoo hauv ntau yam kev siv. Piv txwv li:

• Ib qho kev methoxyl cov ntsiab lus feem ntau ua rau cov polymer hydrophobicity, cuam tshuam nws cov dej solubility thiab lwm yam khoom.
• Ib lub ntsiab lus hydroxypropyl ntau dua tuaj yeem txhim kho cov dej solubility thiab ua yeeb yaj kiab ua yeeb yam ntawm HPMC.

Cov kev qhia tshwj xeeb no yog qhov tseem ceeb hauv kev txiav HPMC kom ua tau raws li cov kev cai sib txawv. Piv txwv li, hauv kev lag luam HPMC nrog cov qib HPMC nrog cov qib tshwj xeeb tuaj yeem cuam tshuam tau cov qauv tshuaj hauv cov ntsiav tshuaj. Hauv kev tsim kho kev tsim kho, nws tuaj yeem cuam tshuam cov dej khaws cia thiab cov khoom nplaum ntawm cov khoom noj khoom haus.

Cov chaw tsim khoom tsim ntau qib HPMC nrog cov qib sib txawv ntawm kev hloov pauv kom tau raws li cov kev xav tau sib txawv. Thaum siv HPMC nyob rau hauv cov qauv, nws yog ib qho tseem ceeb rau cov kws sau ntawv los xav txog qib HPMC uas ua kom haum rau cov khoom uas xav tau thiab kev ua tau zoo rau cov ntawv thov.