Dab tsi yog viscosity qib ntawm hypromellose?

Hypromellose, tseem hu ua HydroxyPropyyl methylcellose (HPMC), yog polymer muab tau los ntawm cellulose. Vim nws cov kev ua haujlwm ntau ntau, nws yog feem ntau siv nyob rau ntau yam kev lag luam, suav nrog cov tshuaj, cov khoom noj khoom haus thiab tshuaj pleev ib ce thiab tshuaj pleev ib ce. Cov cuab yeej tseem ceeb ntawm hypromellose yog nws cov viscosity, uas txawv nyob ntawm qib lossis hom ntawm hypromellose siv.

Hypromellose viscosity grades feem ntau yog cais raws li lawv txoj kev molecular thiab qib hloov chaw. Molecular qhov hnyav cuam tshuam rau polymer saw tsheb ntev, thaum cov degree hloov yog uas hydroxypropyl thiab methyl pawg tau hloov mus rau lub cellulose caj qaum.

Nov yog qee cov viscosity qib ntawm hypromellose thiab lawv cov khoom:

1. Qes viscosity qib:

Cov yam ntxwv: Tsawg molecular hnyav, luv thinfork chains.
Cov ntawv thov: Cov qib no feem ntau siv raws li cov kev khi hauv cov ntsiav tshuaj hauv cov ntsiav tshuaj ntawm cov ntsiav tshuaj uas txo lub pepcosity forsilitates zoo ntws zoo dua ntws thiab compression.

2. Nruab nrab viscosity qib:

Cov Khoom: Nruab nrab kev hnyav hnyav, sib npaug ntawm viscosity thiab solubility.
Cov ntawv thov: Siv dav hauv cov tshuaj li Matrix cov formters hauv kev tswj hwm cov tshuaj tiv thaiv cov tshuaj, thiab hauv kev lag luam khoom noj kom tuab thiab loj.

3. Cov qib siab viscosity:

Cov yam ntxwv: Siab molecular hnyav, ntev ntev cov saw hlau.
Daim ntawv thov: feem ntau siv nyob rau hauv kev tsim tawm-tso tawm npaj thiab ophthalmic daws teeb meem. Lawv muab kev txhim kho gel lub zog thiab viscosity.

4. Kev tshaj lij qib:

Cov Khoom: Cov khoom siv kev cai rau cov ntawv thov tshwj xeeb.
Cov ntawv thov: Cov qib kev cai tuaj yeem tsim kom tau raws li cov kev cai sib txawv xws li cov tshuaj sib txawv, cov ntawv thov tawm ntawm cov tshuaj tso tawm.

Nws yog tsim nyog sau tseg tias viscosity feem ntau yog ntsuas hauv cov koog ntawm centipoise (CP) lossis oblipascal second (npaiv. Qhov tshwj xeeb Viscosity qib xaiv rau ib daim ntawv thov tshwj xeeb yog nyob ntawm cov yam ntxwv xav tau, xws li tso tawm profile hauv cov khoom lag luam lossis cov tshuaj xa khoom hauv cov khoom noj.

Thaum xaiv cov qib ntawm hypromellose, cov tuam ntxhab xav txog yam xws li cov ntawv thov npaj, xav tau viscosity, thiab sib xyaw nrog lwm cov khoom xyaw. Ib qho ntxiv, cov qauv tswj hwm thiab kev tsim kho cov cai yuav cuam tshuam rau kev xaiv ntawm hypromellose hauv cov tshuaj thiab cov khoom noj.

Raws li nrog cov khoom siv, nws yog qhov tseem ceeb ua raws li cov kev lag luam kev lag luam thiab cov kev qhia tshwj xeeb thaum siv cov qauv zoo thiab ua tiav nrog cov qauv muaj feem xyuam.