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Park, Lee Soon
School of Materials Science and Engineering
Research Interests
  • Flexible OLED new materials, process and fabrication
  • Touch Screen Panel(TSP) new materials and process new materials and process
  • Nano-materials synthesis and application (Ag nano-wire and metal mesh electrode)

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Synthesis of nonlinear optical maleimide copolymer by polymer reaction and their electro-optic properties

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Title
Synthesis of nonlinear optical maleimide copolymer by polymer reaction and their electro-optic properties
Author
Kim, Gi HeonKeum, Chang DaeKim, Sung JinPark, Lee Soon
Keywords
Electric properties;  Free radical polymerization;  Glass transition;  Nonlinear optics;  Optical properties;  Organic polymers;  Organic solvents;  Substitution reactions;  Temperature;  Thermodynamic stability;  Ultraviolet spectroscopy
Issue Date
1999-10
Publisher
WILEY-BLACKWELL
Citation
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.37, no.19, pp.3715 - 3722
Abstract
Thermally stable poly(alpha-methyl styrene-co-maleimide) (MSMI) and poly(alpha-methyl styrene-co-4-carboxyphenyl maleimide) (MSCM) substrate polymers were obtained readily by free radical polymerization of comonomers. Introduction of a DR1 chromophore to the maleimide units of MSMI substrate polymer by the Mitsunobu reaction was dependent on the reaction solvent. The degree of substitution of DR1 into the MSMI polymer was bound to be 91.1 mol % and 0.4 mol % by UV spectrometers in the THF and DMF solvent, respectively. DR1 chromophore was, however, substituted in the MSCM polymer at 33.0 mol % by Mitsunobu reaction in the THF solvent. Both substrate and NLO polymer exhibited high thermal stability due to the incorporation of maleimide units in the polymer chain. The glass transition temperature (T-g) and initial decomposition temperature (T-i) of the NLO polymer were in the range of T-g = 185 degrees C and T-i = 310-345 degrees C. The electro-optic coefficient (r(33)) of NLO polymer was determined with an experimental setup capable of the real-time measurement while varying both the poling field and temperature. The NLO polymer MSMI-THF had a higher r(33) value than MSCM-DR due to an increased degree of substitution of DR1 chromophore. MSMI-THF had a maximum r(33) value of 16 pm/V at 135 MV/m poling field with a 632.8 nm light source. (C) 1999 John Wiley & Sons, Inc
URI
https://scholarworks.unist.ac.kr/handle/201301/17158
DOI
10.1002/(SICI)1099-0518(19991001)37:19<3715::AID-POLA8>3.0.CO;2-Z
ISSN
0887-624X
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