Synthesis and nonlinear optical properties of a novel X‐type polyester containing dicyanovinylnitroresorcinoxy groups with enhanced thermal stability of dipole alignment |
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Authors: | Byeongman Jeon Mi Young Song Hak Jin Kim Ju‐Yeon Lee |
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Affiliation: | Institute of Basic Science, Department of Chemistry and Nano Systems Engineering, Inje University, , Gimhae, 621‐749 Korea |
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Abstract: | A novel X‐type polyester (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. Polyester 5 is soluble in common organic solvents such as N,N‐dimethylformamide and acetone. Polyester 5 shows thermal stability up to 300 °C from thermogravimetric analysis with a glass transition temperature obtained from differential scanning calorimetry of near 108 °C. The second harmonic generation (SHG) coefficient (d33) of poled polymer films at the 1064 nm fundamental wavelength is 2.99 pm V?1. The dipole alignment exhibits thermal stability even at 7 °C above the glass transition temperature, and no significant SHG decay is observed below 115 °C due to the partial main‐chain character of the polymer structure, which is acceptable for NLO device applications. © 2013 Society of Chemical Industry |
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Keywords: | nonlinear optical (NLO) polyester differential scanning calorimetry (DSC) thermogravimetric analysis (TGA) second harmonic generation (SHG) |
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