Transparency and High Heat Resistance of Cardo Based Poly(arylene ether)s for Flexible Plastic Substrates

Gyoung-Pyo Kong; Bo-Ra Hong; Moon-Ki Kim; Yang-Kyoo Han; Hyun-Aee Chun

Macromolecular Research, Vol.19, No.6, 608-612, June, 2011

DOI10.1007/s13233-011-0616-3 Export Citation

Transparency and High Heat Resistance of Cardo Based Poly(arylene ether)s for Flexible Plastic Substrates

Gyoung-Pyo Kong, Bo-Ra Hong, Moon-Ki Kim, Yang-Kyoo Han^†, and Hyun-Aee Chun¹

Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Korea
¹Geonggi Technology Service Division, Korea Institute of Industrial Technology, Gyeonggi, 426-171, Korea

E-mail:

New poly(arylene ether)s (PAEs) with both transparency and heat-resistance were prepared by the polycondensation of 4-fluoro-4’(((fluorobenzoyl)phenyl)-oxy)diphenyl sulfone), an ordered-sequence aromatic dihalide, and cardo typed aromatic diols that contain fluorene, adamantane, or cyclohexane moiety. The resulting polymers were found to be amorphous by X-ray diffraction, and their glass transition temperatures ranged from 194 to 245 ℃. Based on the TGA data, they exhibited excellent thermal stability, showing 5% weight loss at 444-496 ℃. They had low thermal expansion coefficients of 58-74 ppm at the temperature range of 50-200 ℃ as well as good mechanical properties with moduli of 1,785-2,350 MPa, except for the PAE that contains the cyclohexane moiety (86 ppm at 50-160 ℃; 1,070 MPa). The optical transmittance of the PAE films (ca. 40 μm thick) was more than 70% at 450-800 nm and they also exhibited a very high refractive index in the range of 1.714-1.752 at 589 nm. In addition, their films showed a low water uptake of approximately 0.65% regardless of their chemical composition. Therefore, the newly developed PAEs show strong potential as plastic substrates for flexible devices for displays, solar cells and e-paper.

Keywords:cardo based poly(arylene ether)s;transparency;high heat resistance;low coefficient of thermal expansion.

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