Synthesis and Characterization of PET Copolyesters Bearing Carbazole Pendants

Lee BH; Lee JW; Jin JI

Korea Polymer Journal, Vol.7, No.6, 325-332, December, 1999

A series of copolyesters consisting of the oxyethyleneoxyterephthaloyl (ET) unit and the oxyethyleneoxy-(2-carbazolyl)terephthaloyl (ECT) unit were prepared and their properties were characterized. The copolyesters containing higher than 20 mole % of the comonomer unit, i.e., the ECT unit, were amorphous according to the wide-angle x-ray diffractometry analysis. The glass transition temperature of the copolyesters increased steadily with increasing content of the ECT unit; from 66℃ for PET to 103℃ for PECT. All of the copolyesters exhibited photoluminescence (PL) in solution as well as in thin films. the wavelength of emitted light by the thin films ranged from about 425 to 600 nm with maximum emission occurring at about 490 nm. Polymer solutions, however, exhibited an additional luminescence with maximum emitted light intensity at 410 nm. the shape of solution emission spectra showed a strong dependence on the polymer concentration and composition. PECT doped with 3 mole% of p-chloranil demonstrated an appreciable photoconductivity.

[References]

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[1] Mark HF, Bikales NM, Overberrger CG, Menges G, Kroschwitz JI, Encyclopedia of Polymer Science and Engineering, 2nd Ed., John Wiley & Sons, New York, vol. 12, pp. 1 ~ 300 (1988)

[2] Thompson AB, Woods DW, Nature, 176, 78 (1995)

[3] Fakirov S, Fisher EW, Schmidt GH, Makromol. Chem., 176, 2459 (1975)

[4] Cavanaugh DB, Wang CH, J. Polym. Sci. B: Polym. Phys., 19, 1911 (1981)

[5] James DE, Packer LG, Ind. Eng. Chem. Res., 34(11), 4049 (1995)

[6] Otton J, Ratton S, J. Polym. Sci. A: Polym. Chem., 26, 2183 (1988)

[7] Reimschuessel HK, Ind. Eng. Chem. Prod. Res. Dev., 19, 117 (1980)

[8] Paszun D, Spychaj T, Ind. Eng. Chem. Res., 36(4), 1373 (1997)

[9] Ha WS, Choun YK, J. Polym. Sci. A: Polym. Chem., 17, 2103 (1979)

[10] Kim CY, Kim YC, Kim SC, Polym. Eng. Sci., 33, 1445 (1993)

[11] Ihm DW, Park SY, Chang CG, Kim YS, Lee HK, J. Polym. Sci. A: Polym. Chem., 34(14), 2841 (1996)

[12] Wu W, Wiswe D, Zachmann HG, Hahn K, Polymer, 22, 1353 (1985)

[13] Hoegl H, Sus O, Neugebauer W, Ger. Patent, 106,8115 (1159)

[14] Hoegl H, Sus O, Neugebauer W, C.A. 55:20742a (1961)

[15] Hoegl H, J. Phys. Chem., 69, 755 (1969)

[16] Schattuck MD, Vahtra U, U.S. Patent, 3,484,327 (1969)

[17] Zhang C, van Seggern H, Pakbaz K, Kraabel B, Schmidt HW, Holmes AB, Nature, 163, 35 (1994)

[18] Kido J, Hongawa N, Okuyama K, Nagai K, Appl. Phys. Lett., 64, 815 (1994)

[19] Nishino H, Yu G, Heeger AJ, Chen TA, Rieke RD, Synth. Met., 68, 243 (1995)

[20] Chung SJ, Kwon KY, Lee SW, Jin JI, Adv. Mater., 14, 1112 (1998)

[21] Klopffer W, J. Chem. Phys., 50, 2337 (1969)

[22] Pai DM, J. Chem. Phys., 52, 2285 (1970)

[23] Gill WD, J. Appl. Phys., 43, 5033 (1972)

[24] Scher H, Montroll EW, Phys. Rev., B, Condens. Matter, 12, 2455 (1975)

[25] Chen J, Slovik JH, Solid State Commun., 17, 783 (1975)

[26] Pfister G, Griffith C, Phys. Rev. Lett., 40, 659 (1978)

[27] Perrin PD, Armarego WLF, Purification of Laboratory Chemicals, 3rd Ed., Pergamon Press, New York (1989)

[28] Tang CW, Appl. Phys. Lett., 48, 183 (1986)

[29] Halls JJ, Pichler K, Friend RH, Moratti SC, Holmes AB, Appl. Phys. Lett., 68, 585 (1996)

[30] Halls JJM, Walsh CA, Greenham NC, Marseglia EA, Friend RH, Moratti SC, Holmes AB, Nature, 376, 4510 (1995)