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Synthesis and Characterization of Polyimides from Bis(3-aminophenyl)-2,3,5,6-tetrafluoro-4-trifluoromethylphenyl phosphine oxide (mDA7FPPO)

등록일
2005년 2월 21일 10시 08분 42초
접수번호
1076
발표코드
금15G7심 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 14시 : 30분
발표형식
심포지엄
발표분야
고분자화학 - 폴리이미드와 이의 응용기술
저자 및
공동저자
이철웅, 곽상민, 윤태호
광주과학기술원 신소재공학과,
A novel diamine, bis(3-aminophenyl)-2,3,5,6-tetrafluoro-4-trifluoromethylphenyl phosphine oxide (mDA7FPPO), was synthesized via Grignard reaction, followed by nitration and reduction. The monomer was characterized by FT-IR, NMR, melting point apparatus and utilized to prepare polyimides with 6FDA, BTDA and ODPA via a conventional two-step synthesis; preparation of poly(amic acid), followed by solution imidization. The molecular weights of polyimides were controlled to 20,000 g/mol by off-stoichiometry and the polyimides were characterized by FT-IR, NMR, GPC, TGA and DSC. Solubility, intrinsic viscosity, dielectric constant and refractive index were also evaluated. The novel polyimides exhibited high Tg(228 - 257 °C), excellent thermal stability (> 500oC), low dielectric constant (2.65 – 2.77) and low birefringence (0.0019 – 0.0034).

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