Effect of water release on thermal properties of polyaniline

Rudajevová, A.; Prokeš, Ján; Varga, Martin

doi:10.1007/s11696-016-0104-5

Cited by 3 publications

(2 citation statements)

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“… water content associated with polyaniline macromolecules. According to literature data, in case of PANI, the conductivity value decreases during heating and in vacuum [31], [49]. This effect is explained by the effect of water on the conductivity of polyaniline.…”

Section: Results Of Electrical Investigation and Discussionmentioning

confidence: 83%

“… PANI linear expansion coefficient, which is the result of the coexistence of classical thermal expansion and contraction due to the release of water [31]. A. Rudajevova et al found that in the first polyaniline heating cycle, the deformation resulting from water desorption is significantly greater than that resulting from classical thermal expansion.…”

Section: Results Of Electrical Investigation and Discussionmentioning

confidence: 99%

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The Effect of Temperature on Electric Conductivity of Polyacrylonitrile-Polyaniline Fibers

et al. 2021

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The article presents an analysis of the influence of temperature on the electrical conductivity of composite polyacrylonitrile-polyaniline fibers (PAN/PANI). The fibers are obtained by synthesizing polyaniline directly in the spinning solution of fiber-forming polyacrylonitrile and characterized by X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM) methods. Electrical characterization of fibers is performed by current-voltage characteristic. The polarizing voltage of the electrodes in the range from -1 V to 1 V with a speed of 100 mV/sec is changed cyclically and linearly while simultaneously the current is measured. The current-voltage characteristic of the fibers is recorded at various temperatures in the range from -15 °C to 100 °C for 30 min. Based on the measurements, temperature changes in the conductance are determined in constant relative humidity. The current-voltage characteristics of the fibers in the ambient atmosphere with a relative humidity of 38 % are linear and symmetrical, which indicates the electron nature of the conductivity and the ohmic contact of the electrode-fiber. The characteristic of temperature conductance changes is not of a typical shape, it is parabolic. The conductance of the developed PAN/PANI fibers at 22 °C is about 1.50•10 -4 S (6.7 kΩ) and decreases below and above this temperature. The analysis of research results and literature data enables the determination of individual factors affecting changes in conductance of the tested composite fiber.

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Section: Results Of Electrical Investigation and Discussionmentioning

confidence: 83%

Section: Results Of Electrical Investigation and Discussionmentioning

confidence: 99%