Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Anionic Polymerization of 2-Pyrrolidone by Toluene Diisocyanate / KOH Catalysis

Toluene Diisocyanate/KOH 촉매작용에 의한 2-Pyrrolidone의 음이온 중합

  • Bal Jung (Department of Chemistry, Chungnam National University) ;
  • Ki Sung Kwon (Department of Chemistry, Chungnam National University) ;
  • Sam Kwon Choi (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Mun Sam Ryoo (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • 정발 (충남대학교 이과대학 화학과) ;
  • 권기성 (충남대학교 이과대학 화학과) ;
  • 최삼권 (한국과학기술원 화학과) ;
  • 유문삼 (한국과학기술원 화학과)
  • Published : 1983.02.20
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Abstract

Anionic polymerization of 2-pyrrolidone was carried out by TDI (Toluene Diisocyanate)/KOH catalysis. The effects of TDI / KOH mole ratio, KOH concentration, temperature and time on polymerization were investigated. It was observed that the highest rate of polymerization and maximum conversion were obtained when TDI / KOH mole ratio was about 0.25. The maximum conversion and the highest viscosity were obtained when the concentration of KOH was 5 mole percent. It was also found that the rate of polymerization and inherent viscosity at $30^{\circ}C$ were higher than those at $50^{\circ}C$. The rate constant ($k_p$) of polymerization was determined by least square method; the values of kp obtained were $57.53{\ell}/mole{\cdot}min\;at\;30^{\circ}C$ and $52.36{\ell}/mole{\cdot}min\;at\;50^{\circ}C$, respectively.

TDI (Toluene Diisocyanate)/KOH 촉매작용에 의한 2-pyrrolidone의 음이온 중합에 있어서 TDI / KOH 몰비율, KOH의 농도, 온도 및 시간이 중합에 미치는 영향을 조사하였다. TDI / KOH 몰비율이 0.25일 때 중합속도가 가장 빠르고 전환율도 높았으며, 또 KOH의 농도가 5몰퍼센트일 때 가장 높은 전환율과 점도가 얻어졌다. 중합온도는 $30^{\circ}C$인 경우가 $50^{\circ}C$에 비해 전환율이 높았으며 점도도 높았다. 최소자승법으로 계산하여 구한 중합속도상수($k_p$)의 값은 $30^{\circ}C$일 때 $57.53 {\ell}/mole{\cdot}min$였고, $50^{\circ}C$일 때 $52.36{\ell}/mole{\cdot}min$였다.

Keywords

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