| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 96 === A new tirphenylamine and heterocyclic-containing dicarboxylic acid, 4-(2-Benzothiazole)-4',4"-dicarboxytriphenylamine, was synthesized by 4-Benzothiazol-2-yl-phenylamine with 4-Fluorobenzonitrile. Polyamides were prepared from the direct polycondensation reactions of the dicarboxylic acid with the diamines. Polyesters were synthesized by high-temperature solution polycondensation reactions of diacid chlorides with diols. All polymers were highly soluble in a variety of solvents. Polyamides and polyesters had useful levels of thermal stability associated with high softening temperatures (199 ~ 315 ℃), 10 % weight loss temperatures in excess of 469 ℃, and char yield at 600 ℃ in nitrogen higher than 50 %. These polymers exhibited maximum UV/vis absorption at 363 nm in NMP solution. Their photoluminescence spectra in NMP solution showed maximum bands at 524 nm. Cyclic voltammograms of polyamides prepared by casting polymer solution onto an indium-tin oxide (ITO)-coated glass substrate exhibited two reversible oxidative redox couples, and the half-wave potential (E1/2) ranged from 1.28 to 1.59 V. The HOMO energy levels of polyamides were in the range from -5.64 to -5.95 eV. The color of the polyamides was changed from neutral colorless to yellow. Cyclic voltammograms of polyesters did not exhibit two reversible oxidative redox couples, and these polyesters did not have electrochemical stability.
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