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Journal of the Korean Chemical Society (JKCS)

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 (Ⅰ)

CO2/KOH Catalysis 에 의한 2-Pyrrolidone 과 ε-Caprolactam 의 음이온 중합 (제1보)
Bal Jung, Sam-Kwon Choi, Gil Soo Seo

정발, 최상권, 서길우
CO2/KOH catalysis에 의해 2-pyrrolidone과 ε-caprolactam의 음이온 중합을 시도하였으며 이 polymer의 물리적 성질을 조사하였다. 2-Pyrrolidone 중합의 경우는, KOH의 농도가 8mole%이상이고 CO2/KOH mole ratio가 0.45일 때 percent conversion이 가장 높았으며 50℃가 최적의 온도임을 알았다. ε-Carprolactam의 중합에 있어서는 80 ∼ 90℃에서 percent conversion이 낮았고, 150 ∼ 180℃의 온도에서는 CO2/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 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.

525 - 532
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