PMMA, Suav lub npe yog polymethyl methacrylate, uas yog ib tug polymer compound nrog zoo heev optical, txhua yam, hluav taws xob, thiab tshuaj stability zog. Nws muaj ntau yam kev siv hauv ntau yam, xws li architecture, automotive, electronics, healthcare, aviation, etc. Kab lus no yuav muab cov ncauj lus kom ntxaws txog PMMA los ntawm cov ntsiab lus ntawm cov ntsiab lus, cov khoom, cov txheej txheem synthesis, thiab daim ntawv thov.
Kev ua haujlwm kho qhov muag: PMMA muaj cov khoom siv kho qhov muag zoo heev, nrog cov pob tshab siab heev thiab lub teeb xa mus txog li 92%, tau txais nws lub npe ntawm "cov yas siv lead ua". Nws qhov refractive index yog qhov tsawg, txog 1.49, ua rau nws cov khoom muaj txiaj ntsig zoo heev. Tsis tas li ntawd, PMMA kuj muaj UV tiv thaiv zoo heev thiab tuaj yeem ua kom ruaj khov rau lub sijhawm ntev nyob rau hauv tshav ntuj.
Cov khoom siv kho tshuab: PMMA muaj lub zog muaj zog, kwv yees li 16 npaug ntawm cov iav zoo tib yam, thiab tuaj yeem tiv taus qhov cuam tshuam sab nraud. Nws kuj muaj qhov hnav tsis kam thiab huab cua tsis kam, thiab tuaj yeem ua haujlwm ruaj khov hauv ntau qhov chaw. Txawm li cas los xij, PMMA muaj qis dua hardness thiab yooj yim khawb.
Cov khoom siv hluav taws xob: PMMA muaj cov khoom siv hluav taws xob zoo, tsis tshua muaj hluav taws xob tsis tu ncua ntawm li 2.6-3.0, thiab qis dielectric poob. Tsis tas li ntawd, nws kuj muaj qee qhov kev ua haujlwm arc tsis kam.
Kev ruaj ntseg tshuaj: PMMA muaj tshuaj lom neeg ruaj khov thiab ua haujlwm zoo rau feem ntau cov kuab tshuaj organic thiab cov tshuaj acid-puag. Txawm li cas los xij, nws yooj yim yaj los ntawm qee cov kuab tshuaj organic xws li acetone thiab chloroform.
Muaj ob txoj hauv kev tseem ceeb rau kev sib xyaw PMMA: ncua kev kawm ntawv polymerization thiab bulk polymerization. Suspension polymerization txoj kev yog ntxiv methyl methacrylate monomer, pib, dispersant thiab lwm yam raw cov ntaub ntawv rau hauv dej, thiab nqa tawm polymerization cov tshuaj tiv thaiv nyob rau hauv nplawm kom tau txais granular PMMA resin. Cov txheej txheem polymerization ntau yog los ua polymerize methyl methacrylate monomer, pib thiab lwm yam ntaub ntawv raw nyob rau hauv cov cua kub kom tau txais thaiv zoo li PMMA resin. Hauv kev tsim khoom tiag tiag, cov txheej txheem sib xyaw tsim nyog feem ntau yog xaiv raws li cov kev xav tau tshwj xeeb thiab kev siv ntawm cov khoom.