Abstract
A series of novel conducting polyurethanes (PUs) with methoxyl triphenylamine (methoxyl-TPA) were synthesized from a new isocyanate with various dihydroxy monomers. The new isocyanate was prepared with p-anisidine and 4-fluoronitrobenzene. The structures of the designed polymers had been determined by FT-IR and 1H NMR. These polymers are amorphous and readily soluble in many polar organic solvents, such as N,N-dimethylformamide, dimethylacetamide and dimethyl sulfoxide. Similarly, the optical band gaps of PU-1, PU-2 and PU-3 are found to be 2.41, 2.51 and 2.44 eV, respectively. In addition, the polymers display excellent thermal stability, reversible electrochemical oxidation, high optical contrast ratio and electrochromic behavior from brown to cyan in the range of 0–1.5 V. High coloration efficiency of PU-2 arrives to 94.17 cm2 C−1.
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Acknowledgements
We thank National Natural Science Foundation of China (nos. 51572058, 51502057), the International Science and Technology Cooperation Program of China (2013DFR10630, 2015DFE52770), National Key Research and Development Program (2016YFB0303903), and the Foundation of Science and Technology on Advanced Composites in Special Environment Laboratory.
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Zhang, K., Wang, Y., Ma, X. et al. Synthesis, spectroscopic and electrochemical characterization of polyurethanes containing triphenylamine derivative. Polym. Bull. 75, 3459–3472 (2018). https://doi.org/10.1007/s00289-017-2219-4
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DOI: https://doi.org/10.1007/s00289-017-2219-4