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Vol. 26 No. 22 (2014): Vol 26 Issue 22

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Liquid-Crystal Aromatic Polyesters Containing Azo and Sulfone Units

https://doi.org/10.14233/ajchem.2014.17759
Ming Yan Qiu
College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan, P.R. China
Yong Sheng Niu
College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan, P.R. China
You Zhu Yu
College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan, P.R. China
Yu Hua Guo
College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang, Henan, P.R. China

Corresponding Author(s) : Yong Sheng Niu

nys2205@163.com

Asian Journal of Chemistry, Vol. 26 No. 22 (2014): Vol 26 Issue 22

Abstract

Two novel aromatic polyesters containing azo and sulfone units were synthesized by poly-condensation of 4,4'-azobenzene-dicarbonyl chloride with dihydroxydiphenyl sulfones at low temperature. The synthesized polymers exhibited good solubility, inherent viscosity (reaches 1.05 dL g-1), high glass transition temperature (above 200 °C) and thermal stability (£ 5 % weight loss at 348 °C), which were characterized by Fourier transform infrared spectroscopy. The liquid crystalline and photoisomerization properties were observed by polarizing optical microscope and an ultraviolet-visible spectrophotometer.

Keywords

Azo-polyesters Soluble properties Photoisomerization Liquid-crystal polymers
Yan Qiu, M., Sheng Niu, Y., Zhu Yu, Y., & Hua Guo, Y. (2014). Liquid-Crystal Aromatic Polyesters Containing Azo and Sulfone Units. Asian Journal of Chemistry, 26(22), 7759–7762. https://doi.org/10.14233/ajchem.2014.17759
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