Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis and Properties of Nonlinear Optical Polymer Derived from α-Methyl Styrene/Maleic Anhydride by Polymer Reaction

고분자 반응을 이용한 Maleic anhydride계 비선형 광학 고분자의 합성 및 전기광학 특성

  • Park, Lee Soon (Department of Polymer Engineering, Kyungpook National University) ;
  • Keum, Chang Dae (Department of Polymer Engineering, Kyungpook National University) ;
  • Song, Jae Won (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Kim, Kwang Taek (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Kim, Gi Heon (Research Laboratory of Resources Utilization, Tokyo Institute of Technology) ;
  • Kang, Shin Won (Sensor Technology Research Center, Kyungpook National University)
  • 박이순 (경북대학교 고분자공학과) ;
  • 금창대 (경북대학교 고분자공학과) ;
  • 송재원 (경북대학교 전자전기공학부) ;
  • 김광택 (경북대학교 전자전기공학부) ;
  • 김기현 (동경공업대학 자원화학연구소) ;
  • 강신원 (경북대학교 센서기술연구소)
  • Received : 1998.03.26
  • Accepted : 1998.06.08
  • Published : 1998.10.10
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Abstract

Non-linear optical polymer based on poly (${\alpha}$-methylstyrene-co-maleic anhydride) (MSMA) substrate polymer was prepared by polymer reaction method and its thermal and electro-optic properties were examined. In the polymer reaction between MSMA substrate polymer and 2-[4-(4-nitrophenylazo)-N-ethylphenylamino]ethanol (DR1) chromophore, the degree of substitution of DR1 into MSMA was higher with the 4-dimethylaminopyridine (DMAP) as catalyst and 3-dicyclohexyl carbodiimide (DCC) as dehydrating agent (sample, MSMA-DC) than the one with just 4-dimethylaminopyridine as catalyst (sample, MSMA-D). The synthesized NLO polymer (MSMA-DC) exhibited electro-optic coefficient of 18 pm/V (632.8 nm) and glass transition temperature ($T_g$) of about $175^{\circ}C$.

${\alpha}$-Methyl styrene과 maleic anhydride를 공단량체로 사용하여 유리전이온도가 높고 내열성이 우수한 poly (${\alpha}$-methylstyrene-co-maleic anhydride) (MSMA) 기재 고분자 (substrate polymer)를 합성하고 여기에 니트로기를 가진 발색단을 고분자반응을 이용하여 도입하는 반응 및 생성된 비선형 광학 고분자의 전기 광학 특성에 대해 조사하였다. MSMA 기재 고분자에 hydroxyl기를 가지는 azo계 발색단 (chromophore) 2-[4-(4-nitrophenylazo)-N-ethylphenylamino]ethanol (DR1)을 고분자 반응 (polymer reaction)으로 maleic anhydride에 ester 결합으로 도입할 때 4-dimethylaminopyridine (DMAP) 촉매만을 쓴 것 (MSMA-D)보다 DMAP와 3-dicyclohexyl carbodiimid (DCC)를 동시에 사용한 경우 (MSMA-DC)가 DR1 발색단의 도입율이 높게 나타났다. 비선형 광학 고분자 (MSMA-DC)의 전기광학계수 ($r_{33}$)는 파장이 632.8 nm인 광원에서 18 pm/V의 값을 나타냈으며 열적 안정성도 유리전이 온도 ($T_g$)가 $175^{\circ}C$ 이상으로 우수하게 나타났다.

Keywords

Acknowledgement

Supported by : 정보통신부

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