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

Awọn ẹda kemikali

Methacrylic acid, abbreviated MAA, jẹ ẹya Organic yellow.Alaini awọ yii, omi viscous jẹ acid carboxylic pẹlu õrùn aibikita.O ti wa ni tiotuka ninu omi gbona ati ki o miscible pẹlu julọ Organic olomi.Methacrylic acid jẹ iṣelọpọ ni iṣelọpọ ni iwọn nla bi iṣaju si awọn esters rẹ, paapaa methyl methacrylate (MMA) ati poly (methyl methacrylate) (PMMA).Awọn methacrylates ni ọpọlọpọ awọn lilo, paapaa julọ ni iṣelọpọ awọn polima pẹlu awọn orukọ iṣowo bii Lucite ati Plexiglas.MAA waye nipa ti ara ni awọn iwọn kekere ninu epo ti Roman chamomile.

Awọn ohun elo

Methacrylic acid ni a lo ninu iṣelọpọ awọn resini methacrylate ati awọn pilasitik.O jẹ lilo bi Monomer fun awọn resini iwọn-nla ati awọn polima, iṣelọpọ Organic.Ọpọlọpọ awọn polima da lori awọn esters ti acid, bi methyl, butyl, tabi awọn esters isobutyl.Methacrylic acid ati awọn esters methacrylate ni a lo lati ṣeto ọpọlọpọ awọn polima [→ Polyacrylamides ati Poly(Acrylic Acids), → Polymethacrylates].Poly (methyl methacrylate) jẹ polima akọkọ ni ẹka yii, ati pe o pese omi-ko o, awọn pilasitik lile ti a lo ni fọọmu dì ni glazing, awọn ami, awọn ifihan, ati awọn panẹli ina.

Ti araform

Ko oolomi

Kíláàsì ewu

8

Igbesi aye selifu

Gẹgẹbi iriri wa, ọja naa le wa ni ipamọ fun awọn oṣu 12 lati ọjọ ifijiṣẹ ti o ba wa ni awọn apoti ti o ni wiwọ, aabo lati ina ati ooru ati fipamọ ni awọn iwọn otutu laarin 5 - 30 ° C.

Taṣoju-ini

Ojuami yo

12-16 °C (tan.)

Oju omi farabale

163°C (tan.)

iwuwo

1.015 g/mL ni 25 °C (tan.)

oru iwuwo

> 3 (la afẹfẹ)

oru titẹ

1 mm Hg (20 °C)

refractive Ìwé

n20/D 1.431(tan.)

Fp

170 °F

iwọn otutu ipamọ.

Fipamọ ni +15 °C si +25°C.