Q: Tom qab PVA hais tawm, pvp hmoov ntxiv thiab yaj ntawm chav sov, thiab plaub ya ri?
Vim li cas nws thiaj li ua tiav yog yaj thiab cov hmoov tau ntxiv, thiab cov hmoov tau muab do ntawm chav tsev kub, cov plaub ya ri? Qhov no yog dab tsi?
Feem ntau cov laj thawj yog PVA tsis yog rhuav lossis kev sib xyaw sib xyaw / kev sib xyaw ntau tshaj qhov tau tshaj plaws. Nws raug nquahu kom ua tau zoo rau kev sib cais (PVA PVA), maj mam hloov cov kuab tshuaj polymer, thiab tswj cov kev daws teeb meem p thiab ionic. Yog tias cov teeb meem tseem tshuav, kev txheeb xyuas txuas ntxiv ntawm cov nag los ntawm infrared spectroscopy lossis me me yog xav tau.
Q: Ntev npaum li cas nws siv sijhawm los ua kom sov pva aqueous daws? Kuv tau rhuab nws rau plaub teev tab sis tseem muaj cov khoom tseem pom. Puas yog nws tsis kiag li?
A: Ua ntej do ntawm chav sov txog li ib nrab ib teev, tom qab ntawd do hauv dej da dej ntawm 95℃rau txog ib teev thiab ib nrab. Kuv tsis xav tias nws ua ntau qhov sib txawv txawm tias lub sijhawm ntev dua lossis luv dua. Kuaj koj tus qauv. Yog tias nws tseem tsis tau yaj tom qab siv sijhawm ib teev thiab ib nrab, ntxiv sijhawm ntxiv.