Methyl methacrylate

ʻO ka inoa Pākē: methyl methacrylate, i kapa ʻia ʻo MMA he mea kemika koʻikoʻi e hiki ke hoʻopololei iā ia iho a i ʻole copolymerize me nā monomers ʻē aʻe i mua o ka mālamalama a me ka wela a i ʻole nā ​​catalysts. Hoʻohana nui ʻia ia e hana i ka polymethyl methacrylate (PMMA no ka pōkole) a me ka polyvinyl chloride impact modifiers (e like me ACR, MBS). Hiki ke hoʻohana ʻia i loko o nā uhi, adhesives, paʻi textile a me nā mea kōkua kala a me nā māla ʻē aʻe. Loaʻa iā ia kahi ākea o nā hoʻohana.

ʻO ke kaʻina hana synthesis nui o MMA
Nui nā ʻano hana synthesis no MMA, me ka acetone cyanohydrin method (ACH method), isobutylene/tert-butanol oxidation method (C4 method), ethylene method (C2 method), methanol-methyl acetate method (C1 method), etc., e like me i kā lākou He ʻokoʻa ka helu kalapona maka a hiki ke hoʻokaʻawale ʻia i ke ala C1, ala C2, ala C3 a me ke ala C4.
Mai kahi hiʻohiʻona honua, ʻo ke kaʻina hana maʻamau i hoʻohana ʻia ʻo ke ʻano ACH. ʻO kēia ʻenehana kaʻina hana he ʻano oʻo, kūpaʻa a maʻalahi, ʻike ʻia ma kahi o 61.6% o ka hana o ka honua, ka mea nui i ʻAmelika ʻAmelika, ʻEulopa Komohana, a me Kina; ukali ʻia e ke ʻano C4, i hoʻomohala ʻia e Iapana Shokubai Chemical Hoʻomohala ʻia e Industrial Corporation a me Mitsubishi Rayon Company i ka makahiki 1982, ua holomua ka ʻenehana, ʻaʻohe mea ʻawaʻawa a ʻaʻohe mea pōʻino, he liʻiliʻi nā huahana a haʻahaʻa ke kumukūʻai, helu helu. no kahi o 30.5% o ka hana o ka honua.

Na Waiwai Kemika

ʻO ka wai kala ʻole, maʻalahi ka maʻalahi. Hiki ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe kūlohelohe e like me ka ethanol, ether, acetone, etc. Hiki ke hoʻoheheʻe ʻia i ka ethylene glycol a me ka wai.

Hoʻohana:

Hoʻohana nui ʻia ma ke ʻano he monomer o ke aniani kūlohelohe, a hoʻohana ʻia hoʻi e hana i nā plastics, coatings, etc.

ʻano ʻano

Helu CAS 80-62-6

Huina molekala C5H8O2

Kaumaha molekula 100.12

EINECS Helu 201-297-

Ka helu heheʻe -48°C (māmā)

Ka helu hoʻolapalapa 100°C (māmā)

Māmā 0.936g/mL ma 25°C (māmā)

Māmā 3.5 (vsair)

Pumi mahu 29mmHg (20°C)

Ke kiko uila 50°F

Nā kūlana mālama 2-8°C Solubility 15g/l Form Crystalline pauda a aniani paha

ʻIkepili Hoʻokaʻaʻike

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