Nylon 4-polybutadiene block copolymers were synthesized by anionic polymerization of 2-pyrrolidone using ITPB (Isocyanate Terminated Polybutadiene) as a macroinitiator and KOH as a catalyst. These copolymers were characterized by infrared spectra. Also, thermal behaviors of these polymers were investigated by differential scanning calorimetry. The effects of KOH concentration, ITPB/KOH mole ratio and temperature on polymerization were investigated. It was observed highest that the rate of polymerization and maximum conversion were obtained when ITPB/KOH mole ratio was about 0.25. It was also found that the conversions at 30℃ were higher than those at 50℃ and the maximum conversion was obtained when the concentration of KOH was 4 mole percent.

ITPB(Isocyanate Terminated Polybutadiene)를 macroinitiator로 하여 KOH 촉매하에2-pyrrolidone을 음이온 중합시킴으로써 nylon 4-polybutadiene block공중합체를 합성하였고, 이들 공중합체를 적외선 스펙트럼으로 화인하였으며 열시차 분석법에 의해 열거동도 조사하였다. ITPB/KOH 촉매작용에 있어서 KOH의 농도, ITPB/KOH몰 비율 및 온도가 중합에 미치는 영향을 조사하였다. ITPB/KOH 몰 비율이 0.25일 때 중합속도가 가장 빨랐으며,가장 높은 중합수율을 얻을 수 있었고, 중합온도는 30℃일 경우가 50℃인 경우에 비해 높은중합수율을 얻을 수 있었고, KOH의 농도는 4몰 퍼센트일 때 가장 높은 중합수율을 얻을 수 있었다.

Keywords: