CO2/KOH catalysis에 의해 2-pyrrolidone과 ${varepsilon}$-caprolactam의 음이온 중합을 시도하였으며 이 polymer의 물리적 성질을 조사하였다. 2-Pyrrolidone 중합의 경우는, KOH의 농도가 8mole%이상이고 $CO_2/KOH$ mole ratio가 0.45일 때 percent conversion이 가장 높았으며 $50^{circ}C$가 최적의 온도임을 알았다. ${varepsilon}$-Carprolactam의 중합에 있어서는 80 ∼ $90^{circ}C$에서 percent conversion이 낮았고, 150 ∼ $180^{circ}C$의 온도에서는$ CO_2/KOH$ mole ratio에 크게 관계없이 높은 percent conversion을 얻을 수 있었다. 이들 polymer의 고유점도는 대략 2.0 ∼ 5.0dl/g의 높은 값이었다.
Anionic polymerization of 2-pyrrolidone and ${varepsilon}$-Caprolactam via $CO_2/KOH catalysis was attempted in order to find reaction condition and physical properties of polymers. In case of polymerization of 2-pyrrolidone, the yield of conversion was increased when the concentration of potassium hydroxide was reached above 8 mole percent. The optimum of CO_2/KOH$ mole ratio was 0.45. It was also found that the polymerization was taking place at moderate temperature which was around $50^{circ}C$. With regard to polymerization of-caprolactam, the yield of conversion was relatively low at $80^{circ}C$ to $90^{circ}C$and higher yield of conversion was obtained at higher temperature between $150^{circ}C$ to $180^{circ}C$ regardless of $CO_2/KOH mole ratio. The inherent viscosity of nylon 4 and nylon 6 which was made via CO_2/KOH$ catalysis was measured. The observed inherent viscosity was between 2.0 to 5.0
