Cov nyhuv ntawm cov ntsiab lus methoxy thiab hydroxypropoxy cov ntsiab lus ntawm HPMC

Cov ntsiab lus methoxy thiab hydroxypropoxy cov ntsiab lus hauv Hydroxypropyl Methylcellulose (HPMC) cuam tshuam nws cov khoom thiab kev ua tau zoo hauv ntau daim ntawv thov.Nov yog yuav ua li cas txhua qhov parameter cuam tshuam rau HPMC:

1. Cov ntsiab lus Methoxy:
   • Cov ntsiab lus methoxy hais txog qib kev hloov pauv (DS) ntawm methoxy pawg ntawm cov pob txha cellulose.Nws txiav txim siab tag nrho hydrophobicity ntawm HPMC.
   • Cov ntsiab lus methoxy ntau dua ua rau cov dej solubility ntau dua thiab qis dua gelation kub.HPMCs nrog cov ntsiab lus methoxy ntau dua yooj yim dua hauv dej txias, ua rau lawv haum rau cov ntawv thov uas yuav tsum tau muaj dej nrawm.
   • Cov ntsiab lus Methoxy cuam tshuam rau lub peev xwm thickening ntawm HPMC.Feem ntau, DS siab dua ua rau muaj viscosity ntau dua ntawm qhov tsis tshua muaj siab.Cov cuab yeej no muaj txiaj ntsig zoo hauv cov ntawv thov xws li cov nplaum nplaum, qhov kev txhim kho dej tuav thiab viscosity xav tau.
   • Cov ntsiab lus methoxy siab dua tuaj yeem cuam tshuam cov yeeb yaj kiab tsim, adhesion, thiab kev sib raug zoo nrog lwm cov khoom xyaw.Nws tuaj yeem pab tsim cov yeeb yaj kiab hloov tau yooj yim thiab cohesive hauv cov ntawv thov xws li txheej txheej thiab tshuaj ntsiav tshuaj.
2. Hydroxypropoxy Cov ntsiab lus:
   • Cov ntsiab lus hydroxypropoxy yog hais txog qib kev hloov pauv (DS) ntawm pawg hydroxypropyl ntawm cov pob txha cellulose.Nws txiav txim siab tag nrho hydrophilicity thiab dej tuav cov khoom ntawm HPMC.
   • Ua kom cov ntsiab lus hydroxypropoxy txhim kho cov dej tuav lub peev xwm ntawm HPMC.Nws txhim kho lub peev xwm ntawm HPMC kom khaws cov dej hauv cov txheej txheem, ua rau lub sijhawm ua haujlwm ntev thiab ua kom zoo dua hauv cov ntaub ntawv cementitious, xws li mortars thiab pobzeb adhesives.
   • Hydroxypropoxy cov ntsiab lus tseem cuam tshuam rau qhov kub thiab txias ntawm HPMC.DS siab dua ntawm cov pab pawg hydroxypropyl txo qis qhov kub thiab txias tuaj yeem ua rau kev txhim kho zaj duab xis thiab adhesion nyob rau hauv cov txheej txheej thiab kev siv tshuaj.
   • Qhov piv ntawm cov ntsiab lus methoxy rau cov ntsiab lus hydroxypropoxy cuam tshuam tag nrho qhov sib npaug ntawm hydrophilic thiab hydrophobic zog hauv HPMC.Los ntawm kev kho qhov piv txwv no, cov tuam txhab lag luam tuaj yeem kho qhov kev ua tau zoo ntawm HPMC kom tau raws li cov kev thov tshwj xeeb, xws li viscosity, dej tuav, thiab kev tsim cov yeeb yaj kiab.

Hauv cov ntsiab lus, cov ntsiab lus methoxy thiab hydroxypropoxy cov ntsiab lus ntawm HPMC ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws cov solubility, thickening peev xwm, dej tuav, gelation kub, zaj duab xis-tsim zog, adhesion, thiab compatibility nrog rau lwm cov khoom xyaw.Los ntawm kev tswj hwm cov kev txwv no, cov tuam txhab tsim khoom tuaj yeem tsim HPMC nrog ntau yam khoom tsim nyog rau ntau yam kev siv hauv kev lag luam xws li kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev saib xyuas tus kheej.