Acrylamide → Acrylamide

Participants

Reaction Conditions

Reaction Steps

A solution of multiblock acrylonitrile-glutarimide-acrylamide copolymer of the following composition: 57.4 percent by weight of acrylonitrile units arranged into sequences with average molecular weight of about 1,500,33.2 percent by weight of glutarimide units and 9.4 percent by weight of acrylamide units arranged randomly into sequences with an average molecular weight of 1110, is heated to 75° C. and bubbled with dry air to remove HCl whereupon gaseous ammonia is introduced at a partial pressure of 1.2 atmospheres for two hours. The solution is subjected to air bubbling at ambient pressure and thereafter coagulated with water and formed an acrylonitrile-acrylamide hydrogel comprised of 61.8 mole percent acrylonitrile and 38.2 mole percent acrylamide. Thus illustrated a method of eliminating carboxylic groups from an acrylonitrile-acrylamide-acrylic acid hydrogel.

Provenance & Evidence