Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Preparation of Aromatic Poly(amic dialkyl ester)s by Direct Polymerization and Kinetic Studies of Their Thermal Imidization

직접중합법에 의한 방향족 폴리아미드알킬에스테르의 제조 및 열적 이미드화 속도론에 관한 연구

  • 김영준 (성균관대학교 섬유공학과) ;
  • 손상현 (한국과학기술연구원 고분자연구부)
  • Published : 1997.11.01

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Abstract

Poly(amirs dialkyl ester) precursors of high performance polyimides were synthesized by employing the direct polymerization method using phenylphosphonic dichloride as an activating agent and pyridine as a Lewis base. Their thermal imidization behavior was investigated by performing both isothermal and nonisothermal TGA(thermogravimetric analysis) experiments. The precursor polymers showed a two-stage imidization behavior, i.e., fast imidization at the early stage and slow imidization at the later stage. In our studies, the kinetic data obtained at the early stage were chosen to determine the rate constants. Kinetic data were interpreted using the first order kinetic plot of the logarithmic wt % loss versus time. The observed imidization behavior was interpreted in view of the length of alkyl leaving group, chemical reactivity and the mobilitl of polymer backbones.

Keywords

References

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