Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Studies on the Polymerization and Characterization of Carboxyl-Terminated Polybutadiene (Ⅰ). Effects of Initiator Concentration on Yields and various Characteristics

Carboxyl-Terminated Polybutadiene 의 중합 및 특성에 관한 연구 (제1보). 개시제농도가 수율 및 특성에 미치는 영향

  • Jung-Bu Kang (Hongneung Machine Industrial Corporation) ;
  • Kyung-Joon You (Hongneung Machine Industrial Corporation) ;
  • Suk-Ky Kwon (Hongneung Machine Industrial Corporation) ;
  • Dong-Young Oh (Department of Chemistry, Korea Advanced Institute of Science)
  • Published : 1980.10.30
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Abstract

Carboxyl-terminated polybutadiene was prepared by free-radical polymerization using 4,4'-azobis-[4-cyano valeric acid] as an initiator and the effect of initiator concentration on polymer properties was investigated. Polymerization of the carboxyl-terminated polybutadiene was carried out varying the initiator concentration reacting with a constant butadiene concentration. The carboxyl weight percent decreased with increasing initiator concentration. The conversion was proportional to the square root of initiator concentration, giving a functionality greater than 2.0 which is consistent with the general tendency of free radical polymerization.

4,4'-azobis-[4-cyano valeric acid]를 개시제로 하여 라디칼 중합에 의해 carboxyl-terminated polybutadiene을 제조하고, 개시제의 농도가 중합체의 물성에 미치는 영향을 조사하였다. 부타디엔 농도를 일정하게 유지하고, 개시제 농도를 변화시켜 중합한 결과, 개시제농도가 증가함에 따라 카르복실기 함량이 감소하고 중합수율은 개시제농도의 1/2 제곱에 정비례하였으며, 관능도가 2.0을넘어 일반적인 라디칼 중합의 경향과 일치하였다.

Keywords

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