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Journal of the Korean Chemical Society (JKCS)

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

 
Title
Polymerization of Lactams (Ⅸ). Anionic Polymerization of 2-Pyrrolidone via Phenylphosphonyl-N,N'-bis-ε-caprolactam / KOH Catalysis

Lactam의 중합 (제9보). Phenylphosphonyl-N,N'-bis-ε-caprolactam / KOH 촉매작용에 의한 2-Pyrrolidone 의 음이온 중합
Author
Jung Hag Park, Bal Jung, Sam K. Choi

박정학, 정발, 최삼권
Keywords
Abstract
PPBC/KOH 촉매작용에 의한 2-pyrrolidone의 음이온중합에 있어서 PPBC/KOH 몰비, KOH의 농도 및 온도가 중합에 미치는 영향을 조사하였다. PPBC/KOH 몰비가 0.5일때 중합속도가 가장 빠르고 전환율도 가장 높았으며, 또 KOH 의 농도는 2몰%일때 가장 높은 전환율과 점도가 얻어졌다. 50℃에서의 중합은 30℃에서의 중합보다 초기반응속도는 빠르나 시간이 경과할 수록 전환율과 점도가 오히려 낮아지는 경향이 관찰되었다. 최소자승법으로 계산하여 구한 중합속도상수(kp)의 값은 30℃일때 22.4 l/mole·hr 였고 50℃일때 191.9 l/mole·hr 였다.

Anionic polymerization of 2-pyrrolidone was carried out via PPBC/KOH catalysis. The effects of PPBC/KOH mole ratio, KOH concentration and temperature on polymerization have been investigated. It was observed that the highest rate of polymerization and maximum conversion were obtained when PPBC/KOH mole ratio was around 0.5. The maximum conversion and the highest viscosity were obtained when the concentration of KOH was 2 mole percent. It was also found that while the rate of polymerization at 50℃ was higher than at 30℃ in the initial stage of polymerization, the conversion and viscosity were decreased as polymerization time was extended. The rate constant (kp) of polymerization was determined by least square method; the values of kp obtained were 22.4 l/mole·hr at 30℃ and 191.9 l/mole·hr at 50℃, respectively.

Page
167 - 174
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