Qhov sib txawv tseem ceeb ntawm polyvinyl cawv thiab polyvinyl acetate yog tias sab saw ntawm polyvinyl cawv yog ib pab pawg neeg ua haujlwm hydroxyl, whereas sab saw ntawm polyvinyl acetate yog ib pawg acetate functional.
Polyvinyl cawv thiab polyvinyl acetate yog cov ntaub ntawv tseem ceeb polymer. Cov polymers no muaj ntau daim ntawv thov sib txawv hauv kev lag luam sib txawv.
Polyvinyl cawv yog dab tsi?
Polyvinyl cawv yog cov khoom siv polymer uas yog dej-soluble thiab muaj cov tshuaj formula [CH2CH(OH) n Nws yog cov khoom siv hluavtaws hluavtaws uas tseem ceeb heev hauv kev ua cov ntaub ntawv, textile qhwv sizing, thiab ua cov thickener thiab emulsion stabilizer hauv PVAC nplaum formulations. Ntxiv mus, cov khoom no muaj txiaj ntsig zoo hauv ntau hom txheej txheej thiab hauv 3D luam ntawv. Tsis tas li ntawd, polyvinyl cawv yog ib yam khoom uas tsis muaj xim thiab tsis muaj ntxhiab, uas yog muag muag feem ntau yog cov hlaws dai los yog cov tshuaj hauv dej.
Daim duab 01: Polyvinyl Alcohol Beads
Thaum xav txog kev siv cov polymer no, nws yog qhov tseem ceeb hauv kev siv kho mob vim nws qhov biocompatibility xwm thiab tsis tshua muaj siab rau cov protein adhesion. Tsis tas li ntawd, nws muaj toxicity tsawg. Muaj qee qhov kev siv tshwj xeeb ntawm polyvinyl cawv, suav nrog kev hloov cov pob txha mos, kev npaj cov tshuaj tiv thaiv kab mob, thiab tshuaj tua kab mob. Tsis tas li ntawd, cov khoom siv polymer no yog ib qho tseem ceeb ua ib qho kev pab cuam hauv kev ncua polymerization. Tuam Tshoj tsim ntau ntau ntawm polyvinyl cawv raws li kev tiv thaiv colloid los tsim polyvinyl acetate dispersions.
Hauv qhov sib piv rau feem ntau lwm cov yas yas, polyvinyl cawv tuaj yeem npaj los ntawm polymerization ntawm cov monomer sib xws, vinyl cawv. Ntxiv mus, peb tuaj yeem npaj cov tshuaj no los ntawm hydrolysis ntawm polyvinyl acetate los yog siv vinyl ester-derived polymers thiab formate los yog chloroacetate (tsis yog acetate).
YPolyvinyl Acetate yog dab tsi?
Polyvinyl acetate yog ib qho polymer uas muaj cov tshuaj formula C4H6O2) n. Nws tseem hu ua cov kua nplaum ntoo, cov kua nplaum dawb, cov nplaum nplaum, cov kua nplaum hauv tsev kawm ntawv, thiab Emer cov kua nplaum. Dav dav, cov khoom no muaj nyob rau hauv cov nplaum rau cov khoom ntxeem tau xws li ntoo, ntawv, thiab ntaub. Qhov no yog aliphatic polymer nrog cov khoom siv roj hmab thiab cov khoom siv hluavtaws. Tsis tas li ntawd, peb tuaj yeem faib nws ua cov khoom siv thermoplastic polymer.
Daim duab 02: Cov qauv tshuaj ntawm Polyvinyl Acetate
Polyvinyl acetate muaj qib ntawm polymerization uas nyob ntawm 100 mus rau 5000. Cov ester pawg hauv cov khoom no yog rhiab heev rau hauv paus hydrolysis, thiab lawv tsuas yog hloov cov khoom rau hauv polyvinyl cawv thiab acetic acid. Tsis tas li ntawd, ntau cov kab mob, nrog rau cov kab mob filamentous, algae, poov xab, lichens, thiab kab mob, tuaj yeem degrade polyvinyl acetate.
Muaj ntau yam tseem ceeb ntawm cov ntaub ntawv no: raws li cov kua nplaum ntoo, ua daim ntawv nplaum, hauv phau ntawv khi, hauv cov khoom siv tes ua, ua cov nplaum nplaum, ua cov primer rau phab ntsa ntub dej thiab lwm cov substrates, ua cov pos hniav hauv cov pos hniav., etc.
Qhov txawv ntawm Polyvinyl Cawv thiab Polyvinyl Acetate yog dab tsi?
Polyvinyl cawv yog cov khoom siv polymer uas yog dej-soluble thiab muaj cov tshuaj formula [CH2CH(OH)]n. Polyvinyl acetate yog cov khoom siv polymer uas muaj cov tshuaj formula C4H6O2)n. Qhov sib txawv tseem ceeb ntawm polyvinyl cawv thiab polyvinyl acetate yog tias sab saw ntawm polyvinyl cawv yog hydroxyl ua haujlwm pab pawg whereas sab saw ntawm polyvinyl acetate yog ib pawg acetate functional.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm polyvinyl cawv thiab polyvinyl acetate hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Polyvinyl Cawv vs Polyvinyl Acetate
Polyvinyl cawv thiab polyvinyl acetate yog cov ntaub ntawv tseem ceeb polymer. Cov polymers no muaj ntau yam kev siv sib txawv hauv kev lag luam sib txawv. Qhov sib txawv tseem ceeb ntawm polyvinyl cawv thiab polyvinyl acetate yog tias sab saw ntawm polyvinyl cawv yog hydroxyl ua haujlwm pab pawg, whereas sab saw ntawm polyvinyl acetate yog ib pawg acetate functional.
