Abstract
The polyaniline dispersions stabilized with poly(N-vinylpyrrolidone) (PANI/PVP) were synthesized by oxidative polymerization with different mass ratios of PANI and PVP and different molar concentrations of the components in the polymerization mixture. The composite powders prepared from colloidal PANI/PVP dispersions were characterized by thermogravimetry and differential thermal analysis. The change in the ratio of PANI and PVP as well as the starting molar concentrations of aniline hydrochloride and oxidant has influence on the resulting properties of the dispersions. Concerning the doping, the results show that PANI/PVP powders are stable up to approximately 160 °C. Degradation of polymer chains starts at temperatures above 250 °C. The PANI/PVP composite powders with lower content of PANI exhibit slightly higher thermal stability. Further, colloidal PANI/PVP dispersions were screen-printed on aluminum foil for infrared spectroscopic characterization and on poly(ethylene terephthalate) foil for electrical measurements. The sheet resistance of printed layers measured by two-point probe was of the order of tens to thousands of kΩ sq−1. The influence of both the change in the composition and the drying temperature is discussed.
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This work was supported by the Technology Agency of the Czech Republic (Project No. TE01020022).
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Peřinka, N., Držková, M., Hajná, M. et al. Thermal analysis of polyaniline poly(N-vinylpyrrolidone)-stabilized dispersions. J Therm Anal Calorim 116, 589–595 (2014). https://doi.org/10.1007/s10973-014-3667-9
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DOI: https://doi.org/10.1007/s10973-014-3667-9