Abstract
Poly(arylene sulfone)s (PASs) containing a 9,9′-spirobifluorene (SBF) skeleton in the main chain were synthesized in high yields by the oxidation of the corresponding poly(arylene thioether)s. The PASs exhibited good thermal stability (Tg 257–370 °C, Td5>400 °C under nitrogen) and showed high solubility in ordinary organic solvents, such as CHCl3, N-methylpyrrolidone (NMP) and N,N-dimethyl formamide (DMF). All films of PASs showed higher refractive indices in the range of 1.65–1.67 at 587.6 nm than those of commercially available polysulfone, whereas they hardly showed birefringence. These excellent optical and thermal properties are derived from the C2 symmetry and high aromatic component of the SBF moiety.
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Acknowledgements
The work was financially supported by a Grant-in-Aid for Scientific Research (A) (number 18205014) from the Ministry of Education, Culture, Sports, Science and Technology, Japan. The fellowship to RS from JSPS for Young Japanese Scientists is gratefully acknowledged.
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Okuda, H., Seto, R., Koyama, Y. et al. Poly(arylene sulfone)s containing 9,9′-spirobifluorene: synthesis and excellent optical properties. Polym J 42, 795–798 (2010). https://doi.org/10.1038/pj.2010.77
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DOI: https://doi.org/10.1038/pj.2010.77
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