Methacrylic acid (2-Methyl-2-propenoic acid)

Nā ʻano kemika

ʻO ka waikawa Methacrylic, i hoʻopau ʻia ʻo MAA, he mea hoʻohuihui.ʻO kēia wai waihoʻoluʻu, ʻeleʻele, he ʻakika carboxylic me kahi ʻala ʻoluʻolu ʻole.Hiki ke hoʻoheheʻe ʻia i loko o ka wai mehana a hiki ke hoʻopili ʻia me ka hapa nui o nā mea hoʻoheheʻe organik.Hoʻokumu ʻia ka ʻakika Methacrylic i ka ʻoihana ma ke ʻano nui ma ke ʻano he precursor i kāna esters, ʻoi aku ka methyl methacrylate (MMA) a me ka poly(methyl methacrylate) (PMMA).He nui nā hoʻohana ʻana o nā methacrylates, ʻoi loa i ka hana ʻana i nā polymers me nā inoa kālepa e like me Lucite a me Plexiglas.Loaʻa maoli ka MAA i nā mea liʻiliʻi i ka ʻaila o ka chamomile Roma.

Nā noi

Hoʻohana ʻia ka methacrylic acid i ka hana ʻana i nā resins methacrylate a me nā plastics.Hoʻohana ʻia ia e like me ka Monomer no nā resins nui a me nā polymers, synthesis organik.Hoʻokumu ʻia ka nui o nā polymers i nā esters o ka waikawa, e like me ka methyl, butyl, a i ʻole isobutyl esters.Hoʻohana ʻia ka methacrylic acid a me ka methacrylate esters e hoʻomākaukau i kahi ākea o nā polymers [→ Polyacrylamides and Poly(Acrylic Acids), → Polymethacrylates].ʻO ka poly(methyl methacrylate) ka polymer mua ma kēia ʻāpana, a hāʻawi ia i ka wai-māmā a paʻakikī i hoʻohana ʻia ma ke ʻano pepa i ka aniani, nā hōʻailona, ​​​​nā hōʻike, a me nā paneli kukui.

Kikinoform

Akakawai wai

Papa Hazard

8

Ola ola

E like me kā mākou ʻike, hiki ke mālama ʻia ka huahana no 12 mau mahina mai ka lā o ka lawe ʻana inā mālama ʻia i loko o nā pahu i hoʻopaʻa paʻa ʻia, pale ʻia mai ka mālamalama a me ka wela a mālama ʻia i nā mahana ma waena o 5 - 30 ° C

Tmau waiwai

Lae hehee

12-16 °C (kukui)

Lae paila

163 °C (māmā)

mānoanoa

1.015 g/mL ma 25 °C (kukui.)

māhu mahu

>3 (vs ea)

kaomi mahu

1 mm Hg (20 °C)

hōʻike hoʻopaʻapaʻa

n20/D 1.431(māmā)

Fp

170 °F

ka mahana mālama.

E mālama i ka +15 ° C a i +25 ° C.