Methyl methacrylate

Magaca Shiinaha: methyl methacrylate, oo loo yaqaan MMA waa walax kiimiko oo muhiim ah oo iskeed isu beddeli karta ama isku-dubarid karta monomers kale iyadoo ay joogaan iftiin iyo kulayl ama kiciyeyaal. Waxaa inta badan loo isticmaalaa in lagu soo saaro polymethyl methacrylate (PMMA marka la soo gaabiyo) iyo polyvinyl chloride wax ka beddelka saameynta (sida ACR, MBS). Waxa kale oo loo isticmaali karaa dahaarka, dhejiska, daabacaadda dharka iyo kaaliyaha rinjiyeynta iyo meelaha kale. Waxay leedahay isticmaallo badan.

Habka ugu muhiimsan ee MMA
Waxaa jira habab badan oo isku-darka ah oo loogu talagalay MMA, oo ay ku jiraan habka acetone cyanohydrin (habka ACH), habka oxidation isobutylene/tert-butanol (habka C4), habka ethylene (habka C2), habka methanol-methyl acetate (habka C1), iwm., iyadoo loo eegayo. Tirada kaarboonka ceeriinku way ka duwan tahay waxaana loo qaybin karaa wadada C1, wadada C2, wadada C3 iyo wadada C4.
Marka laga eego dhinaca caalamiga ah, habka wax soo saarka ee ugu badan ee la isticmaalo waa habka ACH. Tiknoolajiyaddan habkani waa mid bisil, deggan oo fudud, oo ka dhigan qiyaastii 61.6% wax soo saarka adduunka, oo inta badan ku urursan Waqooyiga Ameerika, Galbeedka Yurub, iyo Shiinaha; waxaa ku xiga habka C4, oo ay samaysay Japan Shokubai Chemical oo ay samaysay Shirkadda Warshadaha iyo Shirkadda Mitsubishi Rayon sanadkii 1982, tiknoolajiyadu waa mid horumarsan, walxaha ceeriinku ma aha kuwo sun ah oo aan waxyeello lahayn, waxaa jira wax soo saar yar oo aan waxyeello lahayn kharashkuna waa hooseeyaa, taasoo ka dhigan qiyaastii 30.5% wax soo saarka adduunka.

Sifooyinka Kiimikada

Dareere aan midab lahayn, si fudud u kala firirsan. Ku milma dareereyaal kala duwan oo dabiici ah sida ethanol, ether, acetone, iwm. Si yar ugu milma ethylene glycol iyo biyo.

Isticmaalka:

Inta badan waxaa loo isticmaalaa monomer galaas dabiici ah, waxaana sidoo kale loo isticmaalaa sameynta balaastikada kale, dahaarka, iwm.

dabeecadda

Lambarka CAS. 80-62-6

Qaacidada molecular-ka C5H8O2

Miisaanka molecular 100.12

Lambarka EINECS. 201-297-

Barta dhalaalaysa -48°C (iftiin)

Barta karinta 100°C (iftiin)

Cufnaanta 0.936g/mL at 25°C (iftiin)

Cufnaanta uumiga 3.5 (vsair)

Cadaadiska uumiga 29mmHg (20°C)

Barta iftiiminta 50°F

Xaaladaha kaydinta 2-8°C Milmida 15g/l Nooca budada kristalinta ama kiristaalka

Macluumaadka Xiriirka

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