Methyl methacrylate

ʻO ka inoa Kina: methyl methacrylate, i kapa ʻia ʻo MMA he mea maka kemika koʻikoʻi hiki ke polymerize ponoʻī a copolymerize paha me nā monomers ʻē aʻe i ke alo o ka mālamalama a me ka wela a i ʻole nā ​​​​mea hoʻoulu. Hoʻohana nui ʻia ia e hana i ka polymethyl methacrylate (PMMA no ka pōkole) a me nā mea hoʻololi hopena polyvinyl chloride (e like me ACR, MBS). Hiki ke hoʻohana ʻia i nā uhi, nā mea hoʻopili, ka paʻi lole a me nā mea kōkua dyeing a me nā ʻoihana ʻē aʻe. Loaʻa iā ia kahi ākea o nā hoʻohana.

Ke kaʻina hana nui o ka MMA
Nui nā ʻano hana synthesis no MMA, me ke ʻano acetone cyanohydrin (ʻano ACH), ke ʻano oxidation isobutylene/tert-butanol (ʻano C4), ke ʻano ethylene (ʻano C2), ke ʻano methanol-methyl acetate (ʻano C1), a pēlā aku, e like me kā lākou helu kalapona maka he ʻokoʻa a hiki ke hoʻokaʻawale ʻia i ke ala C1, ke ala C2, ke ala C3 a me ke ala C4.
Mai kahi kuanaʻike honua, ʻo ke kaʻina hana i hoʻohana nui ʻia ʻo ia ke ʻano ACH. He ʻano oʻo, paʻa a maʻalahi kēia ʻenehana hana, e helu ana ma kahi o 61.6% o ka hana o ka honua, ʻo ia hoʻi ma ʻAmelika ʻĀkau, ʻEulopa Komohana, a me Kina; ukali ʻia e ke ʻano C4, i hoʻomohala ʻia e Iapana Shokubai Chemical I hoʻomohala ʻia e Industrial Corporation a me Mitsubishi Rayon Company i ka makahiki 1982, ua holomua ka ʻenehana, ʻaʻohe mea ʻawahia a ʻino ʻole nā ​​mea maka, he kakaikahi nā huahana ʻaoʻao a he haʻahaʻa ke kumukūʻai, e helu ana ma kahi o 30.5% o ka hana o ka honua.

Nā Waiwai Kemika

Wai ʻole kala, maʻalahi ka lele. Hiki ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe organik like ʻole e like me ka ethanol, ether, acetone, a pēlā aku. Hoʻoheheʻe iki ʻia i loko o ka ethylene glycol a me ka wai.

Hoʻohana:

Hoʻohana nui ʻia ma ke ʻano he monomer o ke aniani organik, a hoʻohana ʻia hoʻi e hana i nā plastics ʻē aʻe, nā uhi, a pēlā aku.

kūlohelohe

Helu CAS 80-62-6

ʻO ke ʻano molekole C5H8O2

Kaumaha molekole 100.12

EINECS Helu 201-297-

Kikowaena hoʻoheheʻe -48°C (lit.)

Ka paila ʻana 100°C (lit.)

Ka nui o ka paʻa 0.936g/mL ma 25°C (mālamalama ʻia)

Ka nui o ka mahu 3.5 (vsair)

Kaomi mahu 29mmHg (20°C)

Wahi lapalapa 50°F

Nā kūlana mālama 2-8°C Solubility 15g/l ʻAno Pauka kristal a kristal paha

ʻIke Hoʻokaʻaʻike

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