Pvp K 9003-39-8

PVPK30 thiab PVPK90 (polyvinyl pyrrolidone, povidone) yog ob qho tib si homopolymers, feem ntau yog dej-soluble dawb hmoov los yog tsis muaj xim pob tshab kua, uas yog polymerized los ntawm N-vinyl pyrrolidone (NVP) monomers. Qhov sib txawv ntawm ob yog qhov hnyav molecular thiab viscosity sib txawv. Qhov loj dua qhov hnyav molecular, qhov viscosity ntau dua. Qhov hnyav molecular ntawm PVPK30 yog hais txog 40, 000, thaum lub cev hnyav ntawm PVPK90 yog kwv yees li 1.3 lab, thiab nws qhov hnyav molecular faib nkhaus yog qhov dav. Homopolymers feem ntau siv K qhov tseem ceeb los sawv cev qhov sib txawv molecular hnyav. Qhov siab dua tus nqi K, qhov hnyav dua molecular. Tus nqi K ntawm PVPK30 yog 27-32, thiab K tus nqi ntau ntawm PVPK90 yog 85-97. Tom qab PVPK30 yaj lawm, cov tsos zoo li nyias nyias thiab cov kua dej yog qhov zoo, thaum PVPK90 muaj viscosity siab thiab tsis zoo tom qab kev sib cais. Raws li cov khoom ntsuas sib txawv, nws muab faib ua qib kev lag luam, qib tshuaj thiab lwm qib. Nws yog dav siv los ua ib qho nplaum, thickener, zaj duab xis-tsim tus neeg saib xyuas, dispersant, leveling tus neeg saib xyuas, tshuaj ntxuav tes, thiab tshuaj tiv thaiv fouling hauv kev luam ntawv thiab dyeing, tshuaj, tshuaj txhua hnub, number case coatings thiab lwm yam lag luam. Khoom nta: tsis tshua muaj tsw thiab lub teeb yaj xim.

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