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Abstract

Diacrylic acid (β-acryloxypropionic acid) forms spontaneously in bulk acrylic acid by a Michael-addition reaction. Fresh samples of acrylic acid containing 0.08–2.9% (m/m) levels of water were stored at constant temperatures of 15, 25, 35, and 45°C up to 65 days. An empirical equation to predict diacrylic acid formation was generated from the data.