PVP, tseem hu ua polyvinylpyrrolidone, yog ib qho hluavtaws polymer tsim los ntawm kev rov ua dua vinylpyrrolidone units. Nws yog feem ntau siv nyob rau hauv ntau yam lag luam xws li tshuaj, tshuaj pleev ib ce, thiab zaub mov.
PVP yog tsim los ntawm carbon, hydrogen, nitrogen, thiab oxygen molecules. Nws cov mis mos molecular yog (C6H9NO)n, qhov twg n sawv cev rau tus naj npawb ntawm cov khoom rov ua dua hauv cov saw hlau polymer. Qhov nruab nrab molecular hnyav ntawm PVP txawv nyob ntawm qhov degree ntawm polymerization, uas nyob ntawm 10,000 mus rau 1,000,000 g/mol.
PVP muaj lub cev thiab tshuaj lom neeg tshwj xeeb uas ua rau nws siv dav hauv ntau daim ntawv thov. Nws yog cov dej-soluble polymer uas tuaj yeem tsim cov ntsiab lus ntshiab, ruaj khov, thiab muaj kuab heev. Nws tseem yog cov khoom tsis muaj tshuaj lom, tsis muaj zog, thiab cov khoom siv biocompatible uas muaj kev nyab xeeb rau tib neeg siv. Nws muaj cov nplaum zoo heev, ua yeeb yaj kiab, thiab emulsifying zog uas ua rau nws muaj txiaj ntsig zoo hauv cov ntsiav tshuaj txheej, stabilizing emulsions, thiab khi cov khoom ua ke. Nws kuj yog cov khoom siv ntau yam uas tuaj yeem hloov kho kom muaj cov khoom sib txawv xws li hydrophobicity, cross-linking, thiab conductivity.
Hauv kev lag luam kws tshuaj, PVP feem ntau yog siv los ua cov ntawv khi, disintegrant, thiab solubilizer hauv cov tshuaj ntsiav tshuaj. Nws kuj tseem siv tau rau hauv cov ntaub ntawv ua kua xws li suspensions thiab emulsions. Hauv kev lag luam tshuaj pleev ib ce, PVP yog siv los ua cov thickener thiab stabilizer hauv cov plaub hau gels, tshuaj pleev, thiab tshuaj zawv plaub hau. Nws kuj tseem siv tau los ua cov yeeb yaj kiab tsim hauv cov ntsia thawv polish thiab mascaras. Hauv kev lag luam khoom noj khoom haus, PVP yog siv los ua kom pom tseeb thiab stabilizer hauv cov dej haus thiab ua cov txheej txheem hauv cov pos hniav.
Hauv kev xaus, PVP yog ntau yam polymer uas tsim los ntawm kev rov ua dua vinylpyrrolidone units. Nws cov khoom tshwj xeeb ntawm lub cev thiab tshuaj lom neeg ua rau nws muaj txiaj ntsig zoo hauv ntau daim ntawv thov xws li tshuaj, tshuaj pleev ib ce, thiab khoom noj. Nws cov khoom tsis muaj tshuaj lom, tsis muaj zog, thiab biocompatible ua rau nws muaj kev nyab xeeb rau tib neeg siv. PVP tseem yog qhov kev xaiv nrov rau ntau qhov kev lag luam vim nws muaj ntau yam thiab ntau yam kev siv.