Sulfuric Acid → Acrylic acid methacrylic acid

Participants

Reaction Conditions

Reaction Steps

Thereafter, a mixture of 32.05 parts by mass of acrylic acid and 89.34 parts by mass of methacrylic acid, and a solution of 14.84 parts by mass of 2,2′-azobis[2-(2-imidazolin-2-yl)propane] and 11.63 parts by mass of concentrated sulfuric acid dissolved in 80.00 parts by mass of deionized water, were simultaneously poured into the flask over 60 minutes. The mixture was kept warm at 85° C. for 2 hours to complete the polymerization reaction, and then the resultant was cooled and taken out. Thus, an acrylic acid/methacrylic acid copolymer was obtained. The non-volatile component fraction was measured, and it was 40% by mass. Furthermore, the molecular weight of the acrylic acid/methacrylic acid copolymer thus obtained was measured by the method described above, and the weight average molecular weight was 9,000 (relative to polyethylene glycol standards). Meanwhile, since the copolymerization ratio is the same as the ratio of the incorporated components if the reaction is brought to completion, the copolymerization ratio is not particularly measured. The same also applies to the copolymers described below.

Provenance & Evidence