ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 24, Number 2
JKCSEZ 24(2)
April 20, 1980 

3-(N-Carbonylpyrrolidone)-propanoic acid potassium-salt and 3-(N-carbonylpyrrolidone)propenoic acid potassium-salt were synthesized by the reaction of 2-pyrrolidone potassium-salt with succinic anhydride and maleic anhydride in acetone and in acetone and in benzene. The anionic polymerization of 2-pyrrolidone with 3-(N-carbonylpyrrolidone)-propanoic acid potassium-salt or 3-(N-carbonylpyrrolidone)-propenoic acid potassium-salt as an initiator and potassium hydroxide as a catalyst was studied. It was found that 2.0 and 1.0 mole %, concentration of catalyst and initiator, and temperature of 50℃ was the optimum condition obtaining highest conversion and viscosity of polymer. The inherent viscosity of nylon 4 was measured to be 1.2 dl/g and 2.3 dl/g.