Azobisisobutyronitrile → Styrenemaleic anhydride

Participants

Reaction Steps

of styrene (2 mol) and 196 gs. of maleic acid anhydride were dissolved in 1600 gs. of 2-butanone, whereafter as catalyst 0.5 gs. of azo-bis-isobutyronitrile was added. The mixture was completely polymerized in a nitrogen atmosphere in a period of approx. 4 hours, while being stirred and heated at approx. 70°-80°C. The dry, solid polymer could be obtained from the solution as a white powdery substance with a melting-point above 200°C by precipitating with methanol, filtering off, rinsing out with methanol and drying.

Provenance & Evidence