ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 20, Number 6
JKCSEZ 20(6)
December 20, 1976 

Anionic polymerization of 2-pyrrolidone and ε-Caprolactam via CO2/KOH catalysis was attempted in order to find reaction condition and physical properties of polymers. In case of polymerization of 2-pyrrolidone, the yield of conversion was increased when the concentration of potassium hydroxide was reached above 8 mole percent. The optimum of CO2/KOH mole ratio was 0.45. It was also found that the polymerization was taking place at moderate temperature which was around 50℃. With regard to polymerization of-caprolactam, the yield of conversion was relatively low at 80℃ to 95℃ and higher yield of conversion was obtained at higher temperature between 150℃ to 180℃ regardless of CO2/KOH mole ratio. The inherent viscosity of nylon 4 and nylon 6 which was made via CO2/KOH catalysis was measured. The observed inherent viscosity was between 2.0 to 5.0.