Methyl methacrylate (MMA) muaj ntau yam kev siv:

Daim ntawv thov tseem ceeb: Ua ib lub monomer ntawm cov iav organic (polymethylmethacrylate, PMMA), siv los tsim cov yas pob tshab.
Lwm cov yas thiab cov txheej txheem: Siv los tsim lwm cov resins, plastics, thiab cov txheej txheem, muab cov khoom siv raw tseem ceeb rau cov lag luam no.
Siv ntau yam hauv kev lag luam: Ua tus neeg sawv cev rau roj nplua nyeem, tus neeg sawv cev rau kev ntsuas qhov loj ntawm cov ntoo thiab cov khoom siv cork, tus neeg sawv cev rau kev tsau cov khoom siv lub cev muaj zog, tus neeg sawv cev rau kev txhuam ntawv, tus neeg sawv cev rau kev luam ntawv thiab zas xim, tus neeg sawv cev rau kev kho tawv thiab cov khoom siv rwb thaiv tsev, thiab lwm yam, nws yog siv dav hauv ntau qhov chaw lag luam.
Tshuaj tua kab mob nruab nrab: Ua ib qho tshuaj nruab nrab ntawm fungicide Sclerotium, nws yog siv rau hauv kev tsim tshuaj tua kab.
Methyl methacrylate yog ib yam khoom siv tshuaj lom neeg tseem ceeb. Nws cov pa thiab cua tuaj yeem ua rau muaj kev sib xyaw ua ke. Thov xyuam xim rau kev nyab xeeb thaum siv nws4. Nws tsis yog tsuas yog ua lub luag haujlwm tseem ceeb hauv kev lag luam yas thiab txheej txheem, tab sis kuj ua lub luag haujlwm tseem ceeb hauv ntau lwm qhov chaw.

Txhua txoj kev no muaj nws tus yam ntxwv, thiab cov kev tsim nyog tuaj yeem xaiv tau raws li qhov xav tau thiab cov xwm txheej tshwj xeeb.

Cov txheej txheem npaj ntawm methyl methacrylate (MMA) feem ntau suav nrog cov hauv qab no:

Txoj kev Acetone cyanohydrin: Siv acetone ua cov khoom siv raw, ua ntej tshaj tawm nrog hydrocyanic acid los tsim acetone cyanohydrin, thiab tom qab ntawd cua sov nws nrog concentrated sulfuric acid thiab methanol los ua hydrolysis, dehydration thiab esterification reactions los npaj MMA. Txoj kev no yog ib txoj kev siv ntau rau kev tsim MMA. Cov thev naus laus zis yog mature, tab sis cov khoom siv raw hydrocyanic acid yog lom heev thiab peb cov khib nyiab yog nyuaj rau kho.
Txoj kev Isobutylene: Isobutylene raug oxidized rau methacrolein nrog huab cua nyob rau hauv lub xub ntiag ntawm ib tug catalyst, ces oxidized rau methacrylic acid, thiab thaum kawg esterified nrog methanol kom tau txais MMA. Kuj tseem muaj ib kauj ruam oxidation txheej txheem uas ncaj qha oxidizes los tsim methacrylic acid thiab tom qab ntawd esterifies nws.
Txoj Kev Propylene: Qhov kev sib xyaw ua ke ntawm propylene, carbon monoxide thiab methanol tsim tawm 2-methoxyisobutyric acid methyl ester, uas tau decomposed rau hauv MMA thiab methanol tom qab hydrolysis.

Cov Khoom Siv Tshuaj Methyl methacrylate
Melting point -48 ° C (lit.)
Kub taw tes 100 ° C (lit.)
Qhov ceev 0.936 g/mL ntawm 25 °C (lit.)
qhov ceev ntawm cov pa dej 3.5 (piv rau huab cua)
siab ntawm cov pa dej 29 hli Hg (20 °C)
Qhov ntsuas refractive n20 / D 1.414 (lit.)
FEMA 4002 | METHYL 2-METHYL-2-PROPENOATE
Kub txog 50 °F
Qhov kub cia khoom: 2-8°C
kev yaj 15g / l
tsim cov hmoov Crystalline los yog Crystals
xim Dawb mus rau daj ntseg
Tsw ntxhiab ntawm 0.10% hauv dipropylene glycol. acrylic aromatic fruity
Hom ntxhiab acrylate
Qhov Ntsuas Qhov Hnov 0.21ppm
txwv tsis pub tawg 2.1-12.5% ​​(V)
Kev yaj dej 15.9 g/L (20 ºC)
Merck 14,5941
Tus lej JECFA 1834
BRN 605459
Henry Txoj Cai Tsis Tu Ncua 2.46 x 10-4 atm?m3/mol ntawm 20 °C (kwv yees li - xam los ntawm kev yaj dej thiab lub zog ua pa)
Kev txwv tsis pub raug NIOSH REL: TWA 100 ppm (410 mg/m3), IDLH 1,000 ppm; OSHA PEL: TWA 100 ppm; ACGIH TLV: TWA 100 ppm nrog rau tus nqi TWA thiab STEL ntawm 50 thiab 100 ppm, raws li.
Dielectric tas li 2.9 (20 ℃)
Kev Ruaj Ntseg: Tsis Hloov Pauv

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