Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Control of Polyaniline Molecular Weight Based on p-aminodiphenylamine

p-aminodiphenylamine을 이용한 폴리아닐린 분자량 조절

  • Hong Jang-Hoo (Department of Fine Chemistry, Seoul National University of Technology) ;
  • Jeon, Je Yeoul (Department of Fine Chemistry, Seoul National University of Technology)
  • 홍장후 (서울산업대학교 정밀화학과) ;
  • 전제열 (서울산업대학교 정밀화학과)
  • Received : 2008.11.06
  • Accepted : 2009.01.06
  • Published : 2009.02.10
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Abstract

The ratio of aniline dimer (p-aminodiphenylamine), which is a nucleation site of chain growth in a chemical polymerization of aniline monomer, to aniline monomer was controlled to synthesize polyaniline with the molecular weight ($M_w$) between 10000 and 20000 g/mol. The result of OCP measurement showed that the reaction rate of polymerization was increased as the mole ratio of dimer was increased. The increase in the molar ratio of dimer resulted in the shift of absorption wavelength of polyaniline to the short wavelength region on measurement of UV/Vis and the decrease of molecular weight on the measurement of GPC.

아닐린 단량체(monomer)의 화학적 중합시 사슬성장의 핵심생성구간에서 아닐린 이합체(dimer, p-aminodiphenylamine)의 몰 비율을 조절하여 반응용액에 첨가함으로써 분자량(Mw, 20000~10000) 조절이 가능한 폴리아닐린을 합성 하였다. 중합반응의 개시로 부터 측정된 반응시간에 따른 open-circuit potential 측정결과 첨가된 이합체의 몰수가 증가할수록 중합속도가 빨라짐을 확인하였다. 첨가된 이합체의 몰수가 증가할수록 UV/Vis. 측정결과 합성된 폴리아닐린의 흡수띄가 단파장으로 이동하였으며, GPC 측정결과 분자량이 감소하는 것을 볼 수 있었다.

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