Abstract
A novel hyperbranched electroactive azo copolymer with different oligoaniline segments was synthesized by an oxidative coupling polymerization approach, exhibiting an exciting molecular structure. The detailed characteristics of the obtained copolymer were systematically studied by Fourier-transform infrared (FTIR) spectra, nuclear magnetic resonance (1H NMR), gel permeation chromatography (GPC) and X-ray powder diffraction (XRD). The thermal resistance of the copolymer was investigated by thermogravimetric analysis (TGA). Through cyclic voltammogram (CV), we explored the electrochemical behavior of the copolymer. Moreover, photoisomerization process and doping process of the copolymer were monitored with UV–vis spectra. Dielectric properties of the as-synthesized copolymer were investigated in detail, and gratifying results have been reported. Firstly, a large enhancement in the dielectric constant was achieved utilizing HCl-doping of the conjugated oligoaniline segments. Secondly, the copolymer in HCl-doped form possessed much higher dielectric constants compared with the similar linear polymer, mainly due to the branched molecular architecture.
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This work has been supported in part by the National Natural Science Foundation of China (No. 21104024 and 50973038), and the National 973 Project (No. S2009061009).
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He, L., Chao, D., Wang, X. et al. Synthesis and properties of novel electroactive poly(aryl ether ketone) bearing oligoaniline segments. J Polym Res 19, 9999 (2012). https://doi.org/10.1007/s10965-012-9999-x
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DOI: https://doi.org/10.1007/s10965-012-9999-x