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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 9
BKCSDE 32(9)
September 20, 2011 

Synthesis of Cardo Based Poly(arylene ether)s for Flexible Plastic Substrates and Their Properties
Moon-Ki Kim, Kyung-Jae Kwon, Yang-Kyoo Han *
Flexible display, Cardo based poly(arylene ether)s, Transparency, High heat resistance, Low CTE
New poly(arylene ether)s (PAEs) with both transparency and heat-resistance were prepared by a polycondensation of FBPODS, an ordered-sequence aromatic dihalide, and cardo typed aromatic diols containing fluorene and/or adamantane moiety and also non-cardo typed 1,5-naphthalene diol. The resulting polymers had their glass transition temperatures ranged from 202 to 247 oC. Based on TGA data, they exhibited excellent thermal stabilities, showing 5% weight loss at 434-487 oC. They had low thermal expansion coefficients of 58-59 ppm at temperature range of 50-200 oC as well as good mechanical properties with moduli of 1757-2143 MPa. The optical transmittance for the PAE films was over 70% at 550 nm, except for the PAE that contains naphthalene moiety (30% at 550 nm). They also showed water uptake of about 0.68% regardless of their chemical compositions. Therefore, the newly developed PAEs show strong potential as plastic substrates for flexible devices for display, solar cell and e-paper.
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