Qhov sib txawv tseem ceeb ntawm polyurethane thiab polycarbonate yog tias polyurethane muaj cov urethane linkages whereas polycarbonate muaj carbonate pawg.
Ob qho tib si polyurethane thiab polycarbonates yog cov khoom sib xyaw polymer uas muaj cov qauv tsim muaj ntau cov monomers. Feem ntau ntawm cov sij hawm, peb npe cov khoom siv polymer nyob ntawm seb hom monomer (s) siv hauv kev tsim khoom. Txawm li cas los xij, polyurethane thiab polycarbonates muaj npe xws li vim tias polyurethane muaj urethane txuas thiab polycarbonate muaj carbonate pawg.
YPolyurethane yog dab tsi?
Polyurethane yog ib qho polymer ua los ntawm isocyanates thiab polyols. Cov polymer sib txawv ntawm lwm cov ntaub ntawv polymer vim tias lwm cov ntaub ntawv polymer muaj npe nyob ntawm cov monomers, tab sis cov polymer no muaj npe vim yog cov urethane linkages rov ua dua thoob plaws hauv cov khoom.
Thaum xav txog kev tsim cov khoom, nws siv cov tshuaj tiv thaiv exothermic ntawm cawv nrog ob lossis ntau pawg ua haujlwm (peb hu lawv "polyols") thiab isocyanates muaj ntau dua ib pawg isocyanate-reactive. Ob lub tebchaw no yog cov monomers rau polyurethane. Qhov no txhais tau tias, tsis muaj urethane monomers hauv cov khoom no.
Daim duab 1: Cov khoom ua los ntawm polyurethane
Muaj ntau yam tseem ceeb siv ntawm polyurethane. Feem ntau nws yog ib qho tseem ceeb los ua npuas ncauj ua npuas ncauj rau lub txaj, cushions, thiab lwm yam. Qhov thib ob, nws yog qhov zoo rau kev ua npuas ncauj ua npuas ncauj. Tsis tas li ntawd, muaj qee qhov kev siv xws li molded ua npuas ncauj, elastomer ntau lawm, rau adhesives, sealers, coatings, thiab lwm yam.
YPolycarbonate yog dab tsi?
Polycarbonate yog ib qho polymer ua los ntawm bisphenol A thiab phosgene. Qhov no yog cov khoom siv ruaj khov. Txawm li cas los xij, nws muaj qhov cuam tshuam tsis zoo thiab tsis muaj khawb tsis kam. Ntxiv mus, nws tuaj yeem tiv taus qhov kub thiab txias. Nws kuj yog pob tshab rau pom lub teeb, uas ua rau nws tseem ceeb hauv kev tsim cov iav xws li lo ntsiab muag.
Daim duab 2: Lub raj mis ua los ntawm Polycarbonate
Nyob hauv cov txheej txheem tsim khoom, thawj kauj ruam yuav tsum tau kho bisphenol A nrog NaOH rau deprotonation ntawm hydroxyl pawg ntawm bisphenol A molecule. Tom qab ntawd, qhov sib xyaw ua ke tuaj yeem hnov mob nrog phosgene los tsim cov khoom siv polycarbonate.
Qhov txawv ntawm Polyurethane thiab Polycarbonate yog dab tsi?
Polyurethane yog ib qho polymer ua los ntawm isocyanates thiab polyols thaum polycarbonate yog ib qho polymer ua los ntawm bisphenol A thiab phosgene. Qhov sib txawv tseem ceeb ntawm polyurethane thiab polycarbonate yog tias polyurethane muaj urethane linkages whereas polycarbonate muaj carbonate pawg.
Tsis tas li ntawd, muaj ntau yam khoom tseem ceeb ntawm ob yam khoom no; polyurethane yog ib qho tseem ceeb vim nws yooj yim, tsis tshua muaj ntom, durability, thiab lwm yam thiab polycarbonate yog ib qho tseem ceeb vim muaj kev cuam tshuam tsis zoo, tsis muaj khawb tsis kam, pob tshab, tuaj yeem tiv taus qhov kub thiab txias, thiab lwm yam. Yog li ntawd, qhov no yog lwm qhov sib txawv ntawm polyurethane thiab polycarbonate.
Cov lus qhia hauv qab no nthuav tawm qhov sib txawv ntawm polyurethane thiab polycarbonate kom ntxaws ntxiv.
Summary – Polyurethane vs Polycarbonate
Polyurethane thiab polycarbonate yog cov khoom siv polymer nyuaj. Cov tebchaw no muaj cov khoom sib txawv uas tseem ceeb heev hauv kev siv sib txawv. Qhov sib txawv tseem ceeb ntawm polyurethane thiab polycarbonate yog tias polyurethane muaj urethane linkages whereas polycarbonate muaj carbonate pawg.
