749251-01-2Relevant academic research and scientific papers
Preparation of novel Y-type nonlinear optical polyimides with high thermal stability of second harmonic generation
Won, Dong-Seon,Lee, Ga-Young,Lee, Ju-Yeon
, p. 231 - 239 (2008)
2,4-Bis-(3,4-dicarboxyphenylcarboxyethoxy)-1-(2,2-dicyanovinyl)benzene dianhydride (4) was prepared and reacted with 1,4-phenylenediamine and 4,4'-oxydianiline to yield novel Y-type polyimides 5-6 containing 2,4-dioxybenzylidenemalononitrile groups as NLO-chromophores, which constitute parts of the polymer backbone. The resulting polyimides 5-6 are soluble in polar solvents such as dimethylsulfoxide and N,N-dimethylformamide. Polymers 5-6 showed a thermal stability up to 330°C in thermogravimetric analysis thermograms with Tg values obtained from differential scanning calorimetry thermograms in the range 179-188°C. The second harmonic generation (SHG) coefficients (d33) of poled polymer films at the 1064 nm fundamental wavelength were around 6.32 × 10-9esu. The dipole alignment exhibited exceptionally high thermal stability even at 20°C higher than Tg, there was no SHG decay below 200°C because of the partial main chain character of polymer structure, which is acceptable for nonlinear optical device applications.
MONOMER COMPOUND FOR CARBAMIC ACID DERIVATIVE POLYMER, CARBAMIC ACID DERIVATIVE POLYMER, POLYMER RESIN COMPOSITION, POLYMER FILM AND AUROMOBILE PART COMPRISING THE SAME
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Paragraph 0215-0217; 0224-0226, (2021/02/02)
The present invention relates to a monomer compound for synthesizing a carbamic acid derivative polymer having a specific structure, to a carbamic acid derivative polymer, to a polymer film comprising the same, and to automotive parts comprising the same. The monomer compound has excellent UV protection and optical properties.
MONOMER COMPOUND FOR CARBAMIC ACID DERIVATIVE POLYMER, CARBAMIC ACID DERIVATIVE POLYMER, POLYMER RESIN COMPOSITION, POLYMER FILM AND AUROMOBILE PART COMPRISING THE SAME
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Paragraph 0228; 0237-0239; 0246-0248, (2021/04/29)
A monomer compound for synthesizing carbamic acid derivatives of a specific structure having an aromatic substituent introduced at a terminal. The present invention relates to a carbamic acid derivative polymer, a polymer film comprising the same, and a v
The design, synthesis, and nonlinear optical properties of novel X-type polyurethane containing dicyanovinylnitroresorcinoxy group with enhanced SHG thermal stability
Song, Mi Young,Jeon, Byeongman,Kim, Hak Jin,Lee, Ju-Yeon
, p. 275 - 281 (2013/02/23)
Novel X-type polyurethane 5 containing 4-(2′,2′-dicyanovinyl)- 6-nitroresorcinoxy groups as nonlinear optical (NLO) chromophores, which constitute parts of the polymer backbone, was prepared and characterized. Polyurethane 5 is soluble in common organic solvents such as acetone and N,N-dimethylformamide. It shows thermal stability up to 280 C from thermogravimetric analysis with a glass transition temperature (Tg) obtained from differential scanning calorimetry thermogram of around 120 C. The second harmonic generation (SHG) coefficient (d33) of poled polymer film at 1064-nm fundamental wavelength is around 6.12 × 10-9 esu. The dipole alignment exhibits a thermal stability even at 5 C higher than Tg, and there was no SHG decay below 125 C due to the partial main chain character of the polymer structure, which is acceptable for NLO device applications.
