Polyvinylpyrrolidone (PVP), tseem hu ua Polyvidone lossis Povidone luv luv, yog cov khoom siv polymer uas tsim los ntawm polymerization ntawm N-vinyl-2-pyrrolidone. Polyvinylpyrrolidone (abbreviated li PVP hauv Lus Askiv) yog dej-soluble dawb resinous khoom tsim los ntawm homopolymerization ntawm N-vinylpyrrolidone. thiab lwm yam. PVP yog ib qho tseem ceeb ntawm cov khoom siv tshuaj zoo nrog kev ua haujlwm zoo thiab muaj txiaj ntsig ntxiv. Nws cov molecule muaj ib pawg polar lactam, uas muaj peev xwm nyiam cov pawg polar. Nws yog soluble hauv dej, thiab cawv, Cov khoom siv tshuaj lom neeg ntawm cov kuab tshuaj organic xws li carboxylic acids, cawv amines, halogenated hydrocarbons, PVP cov khib nyiab, thiab lawv cov tshuaj aqueous yog ruaj khov heev.
xwm
Polyvinylpyrrolidone yog cov hmoov dawb hygroscopic, tsis muaj ntxhiab lossis tsis muaj ntxhiab me ntsis, soluble hauv dej, ethanol, chloroform, thiab feem ntau cov kuab tshuaj organic, insoluble hauv ether, thiab tsis muaj tshuaj lom.
Polyvinylpyrrolidone muab faib ua plaub qib raws li nws qhov nruab nrab molecular hnyav, uas feem ntau qhia los ntawm tus nqi K. Feem ntau, qhov loj dua tus nqi K, qhov ntau dua qhov viscosity thiab muaj zog adhesion.
Thawj zaug ua los ntawm xibfwb Walter Reppe, uas kawm txog acetylene chemistry. Patented hauv 1939. Nws 3.5 feem pua aqueous tov (osmotic siab ntawm 53,328) tau siv los hloov ntshav thaum Ntiaj Teb Tsov Rog II.
kev npaj
Polyvinylpyrrolidone yog tau los ntawm polymerization ntawm monomer N-vinyl-2-pyrrolidone (NVP). NVP tuaj yeem npaj tau los ntawm aminolysis ntawm butyrolactone rau butyrolactone, thiab tom qab ntawd ua tiav nrog acetylene.