Impedance spectroscopic and dielectric analysis of PMMA-CO-P4VPNO polymer films

Raja, V. Sundara; Sharma, A. K.; Rao, Vijayalakshmi

doi:10.1016/j.matlet.2004.05.061

Cited by 120 publications

(60 citation statements)

References 19 publications

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“…As well as, it can be noted at higher frequency the temperature effect is weaker in comparison with the temperature effect at lower frequency. The physics behind these variation can be explained depending on the fact that, in polar materials the initial value of dielectric constant is high, but as the frequency raised the value begins to drop which could be due lack of response of the dipoles, in other word incapability of the dipole to follow the field variations at high frequency [13].…”

Section: Resultsmentioning

confidence: 99%

“…In the polymer material the frequency and temperature dependent conductivity is caused by the hopping of the charge carriers in the localized state and also due to the excitation of charge carriers to upper states in the conduction band [13,14]. The conductivity obeys the empirical universal power law relation [15]:…”

Section: Theorymentioning

confidence: 99%

“…The electrical conductivity is evaluated from electrical conductivity data at lower frequency, the temperature dependent of can be expressed by the following Arrhenius equation [12,13]:…”

Section: Theorymentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

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Electrical Characterization of Polyester Reinforced by Carbon Black Particles

Abdullah¹,

Jamal²,

Tahir³

et al. 2011

IJAPM

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“…Figure 9 shows the plot of lnr ac versus 10 3 /T from which activation energy was calculated using the Arrhenius equation. The temperature dependence of the AC conductivity can be written as follows [37]:…”

Section: The Dielectric Propertiesmentioning

confidence: 99%

Synthesis, thermal degradation and dielectric properties of poly[2-hydroxy,3-(1-naphthyloxy)propyl methacrylate]

et al. 2016

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2-Hydroxy-3-(1-naphthyloxy)propyl methacrylate (NOPMA) monomer was synthesized from reaction of 2-[(2-naphthyloxy)methyl]oxirane with methacrylic acid in the presence of pyridine. The polymerization of NOPMA was carried out by free radical polymerization method in the presence of AIBN at 60°C. The structure of monomer and polymer was characterized by 1 H-NMR, 13 C-NMR and FT-IR spectroscopy techniques. The glass transition temperature and averagemolecular weights of poly(NOPMA) were measured using differential scanning calorimetry and gel permeation chromatography, respectively. The thermal degradation behavior of poly(NOPMA) has been investigated by FT-IR studies of the partially degraded polymer and thermogravimetry. The cold ring fractions (CRFs) were collected at two different temperatures, initially fraction-1 (CRF 1 ) is from room temperature to 320°C, and the other fraction-2 (CRF 2 ) is from 320 to 500°C. The volatile products of the degradation were trapped at -195°C (in liquid nitrogen). All the fractions were characterized by FT-IR, 1 H and 13 C-NMR spectroscopic techniques, and the cold ring fractions (CRFs) were also characterized by GC-MS. For the degradation of polymer, the major compound between products of CRFs is a-naphthol. The GC-MS, FT-IR and NMR data showed that depolymerization corresponding to monomer was not prominent below 320°C in the thermal degradation of poly(NOPMA). The mode of thermal degradation containing formation of the major products was identified. The dielectric permittivity (e 0 ), the loss factor (e 00 ) and conductivity (r ac ) were measured using a dielectric analyzer in the frequency range of 50 Hz to 20 kHz.

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“…In the polymer material the frequency and temperature dependent conductivity is caused by the hopping of the charge carriers in the localized state and also due to the excitation of charge carriers to upper states in the conduction band [13]. The conductivity obeys the empirical universal power law relation [14]: Here σdc represents the dc-electrical conductivity, A and s are dependent on temperature.…”

Section: (4)mentioning

confidence: 99%

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

Al-Khafaji

2013

JNUS

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The work is designed to study experimentally the mechanical and electrical behavior of polymer matrix composites and their hybrids which reinforced by carbon black particles with constant volume fraction (10)% and boron particles with different volume fractions (0,2,4,and 6)% which are bounded with unsaturated polyester resin. Number of mechanical tests were done, they include (hardness, Charpy impact,and bending strength), which done at room temperature in Iraq .Results of the work show that the values of hardness increased with volume fractions of boron powder ,the best values of impact strength and elasticity of modulus present at (4)% .On the other hand,dielectric constant (έ) decreases with increasing applied frequency, and alternating electrical conductivity(σa.c) increases as the applied frequency increases up to 1MHz, While (έ) and (σa.c) increased as increasing of temperature.

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Impedance spectroscopic and dielectric analysis of PMMA-CO-P4VPNO polymer films

Cited by 120 publications

References 19 publications

Electrical Characterization of Polyester Reinforced by Carbon Black Particles

Electrical Characterization of Polyester Reinforced by Carbon Black Particles

Synthesis, thermal degradation and dielectric properties of poly[2-hydroxy,3-(1-naphthyloxy)propyl methacrylate]

Mechanical and Electrical Behavior of Polymer Matrix Composite and their Hybrids Reinforced with (Carbon Black–Boron) Particles

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