Electrical and optical characterization of PMMA doped with Y0.0025Si0.025Ba0.9725 (Ti(0.9)Sn0.1)O3 ceramic

Carbon nanotubes (CNTs) were prepared using Alcholic Catalyst Chemical Vapor Deposition (ACCVD) technique in order to investigate the effects of their addition on the optical, electrical and mechanical properties of Poly (3-octylthiophene-2,5-diyl) (P3OT) matrix. The absorption spectra of the prepared CNTs and CNT-P3OT nanocomposites were measured in the spectral range 200 nm-3,000 nm at room temperature. The optical energy gap was determined from the obtained UV/Vis absorption spectrum. Optical results reveal that the prepared CNTs are almost single walled. Besides, the addition of CNTs to P3OT polymer matrix will decrease the optical energy gap and enhance the optical absorbance of P3OT matrix. On the other hand, the addition of CNTs to P3OT matrix will increase the electrical conductivity of P3OT matrix up to four orders of magnitude above the percolation threshold (0.44 wt% CNTs). Additionally, I-V characteristics indicate that the conduction mechanism is Ohmic at low applied voltage range while it is due to the trap charge limited at high applied voltage range. Furthermore, the behavior of dc conductivity with temperature was also investigated and the obtained results reveal that the activation energy decreases with CNTs content. Finally, mechanical results reveal that the elastic modulus values increase with the increasing of CNTs content in P3OT matrix.

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“…One of the power full analyses used to recognize both the existence and quality of SWCNTs is UV-visible and NIR spectra [22][23][24]. Jeong, M.S.…”

Section: Prepared Carbon Nantubesmentioning

confidence: 99%

“…The absorption coefficient α was calculated from the absorbance (A). After correction for reflection, α was calculated using the relation [22]:…”

Section: Optical Propertiesmentioning

confidence: 99%

Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites

2012

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“…The activation energy increases from 0.116 eV for pure polyester to 0.319 eV for 18 % CB. The addition of CB to Polyester host enhances the electrical conduction of Polyester host due to the electronic and impurity contributions arising from the CB [9].…”

Section: Resultsmentioning

confidence: 99%

“…The dielectric loss factor " can be calculated from measurement value electrical conductance by [9]: "…”

Section: Theorymentioning

confidence: 99%

Electrical Characterization of Polyester Reinforced by Carbon Black Particles

Abdullah¹,

Jamal²,

Tahir³

et al. 2011

IJAPM

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Abstract-Polymer matrix composite, based on Polyester reinforced with (0, 6, 12, and 18) % of carbon black has been prepared using solution cast technique. The dielectric constant and electrical conductivity of the samples are investigated in the frequency range 0.5 10 and within the temperature range 26 80. Dielectric constant and loss tangent decreases with increasing frequency and increase with increasing temperature. The ac electrical conductivity for all samples were found to be weak frequency dependent at low frequency, however vary with frequency as a power law at higher frequency range. The exponential factor found to be in the range 0.65 0.77 . The weakly decreases of with increasing temperature, could be attributed that higher temperature, high mobility of free charges make them more frequency independent conductivity. From the temperature dependence of electrical conductivity, the activation energy at each frequency was calculated using the Arrhenius relation. The variation of the activation energy as a function of carbon black contents, and frequency is also discussed.

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“…The dc conductivity is a result of a continuous hopping process over extended distances [62]. The scaled modulus spectra for real and imaginary part of electric modulus of PEO and PMB films are shown in Fig.…”

Section: Electric Modulus and Relaxation Processmentioning

confidence: 99%

Concentration-dependent ionic conductivity and dielectric relaxation of methyl blue-dyed polyethylene oxide films

Kamath

Devendrappa

2015

Polym. Bull.

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Methyl blue (MB)-dyed polyethylene oxide (PEO) films were prepared by solution casting technique to study the concentration -dependent conductivity and relaxation mechanism. FTIR spectroscopy confirmed the polymer-dye interactions. XRD and DSC data revealed substantial structural modification such as decrease in degree of crystallinity and reduction in spherulites size of polymer matrix due to the addition of MB. Biphasic nature of these films was observed in SEM images. Impedance and polarization current studies confirmed the ion conduction dominance in the films. The addition of MB dye in PEO resulted in enhanced conductivity due to partial dissolution of the crystalline phase. Electrical conductivity as a function of temperature has been studied. The samples exhibited Arrhenius behavior with two different activation energies. The dielectric studies showed non-Debye type relaxation phenomenon. There was an increase of two orders of magnitude in the conductivity for highest dye concentration. These results are explained in terms of molecular disorder in the PEO-dye phase, heat of fusion, impedance spectra, modulus study and relaxation time.

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Electrical and optical characterization of PMMA doped with Y0.0025Si0.025Ba0.9725 (Ti(0.9)Sn0.1)O3 ceramic

Cited by 45 publications

References 23 publications

Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites

Physical characterizations of semi-conducting conjugated polymer-CNTs nanocomposites

Electrical Characterization of Polyester Reinforced by Carbon Black Particles

Concentration-dependent ionic conductivity and dielectric relaxation of methyl blue-dyed polyethylene oxide films

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