Qhov sib txawv tseem ceeb ntawm polycarbonate thiab poly methyl methacrylate yog tias polycarbonate muaj zog dua li poly methyl methacrylate.
Polycarbonate yog cov khoom siv hluavtaws uas nws cov monomer units txuas rau ib leeg los ntawm kev sib txuas ntawm carbonate, thaum poly methyl methacrylate monomer yog cov polymer ua los ntawm methyl methacrylate thiab muaj cov ntawv thov sib txawv.
YPolycarbonate yog dab tsi?
Polycarbonate tuaj yeem piav qhia raws li cov khoom siv hluavtaws uas nws cov monomer txuas mus rau ib leeg los ntawm kev sib txuas carbonate. Nws yog ib daim ntawv yas tsim los ntawm cov tshuaj tiv thaiv ntawm Bisphenol A thiab phosgene, uas yog ob yog monomers uas tsis muaj cov carbonate pawg. Txawm li cas los xij, tom qab polymerization, cov saw hlau polymer muaj cov carbonate txuas, uas ua rau lub npe ntawm cov polymers li polycarbonates.
Daim duab 1: Cov Qauv Tshuaj ntawm Monomer chav tsev ntawm Polycarbonate
Tsis tas li ntawd, polycarbonate polymers muaj cov nplhaib uas muaj ntxhiab. Polycarbonate muaj nyob rau hauv ntau yam xim. Feem ntau, cov polymers no muaj cov pob tshab, tab sis peb tuaj yeem ua qee cov khoom siv xim uas feem ntau yog translucent, nyob ntawm qhov siv ntawm cov xim.
Polycarbonate muaj cov txheej txheem kev loj hlob ntawm cov txheej txheem polymerization. Hauv cov txheej txheem no, cov tshuaj tiv thaiv condensation uas koom nrog ob pawg ua haujlwm tshwm sim (ib qho monomer unsaturated tsis koom nrog). Polycarbonate yog cov khoom muaj zog thiab pob tshab. Tsis tas li ntawd, lub toughness thiab optical clarity ntawm cov ntaub ntawv no ua rau nws haum rau sab hauv tsev thiab sab nraum zoov daim ntaub ntawv thiab. Polycarbonate tau yooj yim machined, thiab cov khoom no muaj qhov zoo ntawm qhov ruaj khov nrog lub zog muaj zog.
YPoly Methyl Methacrylate yog dab tsi?
Poly methyl methacrylate tuaj yeem piav qhia raws li cov khoom siv polymer uas tseem ceeb heev hauv kev siv sib txawv. Nws yog tsim los ntawm monomer methyl methacrylate, uas yog cov organic compound uas muaj cov tshuaj formula CH2=C (CH3) COOCH3. Methyl methacrylate yog cov kua xim tsis muaj xim uas muaj cov methyl ester ntawm methacrylic acid, thiab nws yog monomer ntawm kev tsim loj-scale poly (methyl methacrylate) los yog PMMA polymer.
Daim duab 02: Cov qauv pob txha ntawm Polymethyl Methacrylate Repeating Unit
Muaj ntau txoj hauv kev los tsim cov monomer ntawm poly methyl methacrylate, nrog rau txoj kev cyanohydrin, methyl propionate txoj kev, ntau lawm ntawm propionaldehyde, isobutyric acid, methyl acetylene txheej txheem, isobutylene txoj kev, thiab lwm yam. Tsis tas li ntawd, muaj txoj hauv kev koom nrog. poly methyl methacrylate: siv cyanoacrylate cement, siv cua sov rau vuam, thiab siv cov kuab tshuaj chlorinated, suav nrog dichloromethane. Cov yam ntxwv no tuaj yeem yaj cov yas ntawm qhov sib koom ua ke. Tom qab ntawd, cov pob qij txha fuse thiab teeb tsa, tsim ib qho yuav luag pom tsis tau. Muaj kev siv MMA monomers sib txawv, xws li kev siv hauv kev tsim cov PMMA polymer, kev tsim cov copolymer methyl methacrylate-butadiene-styrene uas muaj txiaj ntsig zoo li kev hloov kho rau PVC, ua raw khoom rau methacrylate, thiab lwm yam.
Qhov txawv ntawm Polycarbonate thiab Poly Methyl Methacrylate yog dab tsi?
Polycarbonate yog cov khoom siv hluavtaws uas nws cov monomer units txuas rau ib leeg los ntawm kev sib txuas ntawm carbonate, hos poly methyl methacrylate yog cov polymer ua los ntawm monomer methyl methacrylate thiab tseem ceeb heev hauv kev siv sib txawv. Qhov sib txawv tseem ceeb ntawm polycarbonate thiab poly methyl methacrylate yog lawv lub zog. Polycarbonate feem ntau muaj zog dua poly methyl methacrylate. Ntxiv mus, polycarbonate yog kim dua poly methyl methacrylate. Tsis tas li ntawd, poly methyl methacrylate yog nruj dua li polycarbonate. Tsis tas li ntawd, polycarbonate tuaj yeem tiv taus txog 120 degrees Celsius, thaum poly methyl methacrylate tuaj yeem tiv taus txog 90 degrees Celsius.
Daim duab hauv qab no nthuav tawm cov ntsiab lus ntawm qhov sib txawv ntawm polycarbonate thiab poly methyl methacrylate hauv daim ntawv tabular.
Summary – Polycarbonate vs Poly Methyl Methacrylate
Polycarbonate thiab poly methyl methacrylate yog cov ntaub ntawv tseem ceeb hauv kev lag luam. Qhov sib txawv tseem ceeb ntawm polycarbonate thiab poly methyl methacrylate yog tias polycarbonate muaj zog dua poly methyl methacrylate piv. Tsis tas li ntawd, poly methyl methacrylate yog nruj dua polycarbonate thiab tsis tuaj yeem tiv taus qhov kub siab tshaj 100 degrees Celsius.
