Dielectric properties of isotactic polypropylene and montmorillonite nanocomposites

Izci, E.; Bowler, Nicola

doi:10.1109/icsd.2010.5568047

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…In polymer-layered silicate nanocomposite systems, the proper addition of layered silicates leads to a great improvement in the properties of the matrix such as thermal stability and mechanical performance [8,9]. For insulating dielectric material, experiments have proven that the addition of an appropriate amount of montmorillonite (MMT) to silicone rubber, polypropylene, polyethylene, and ethylene-vinyl acetate (EVA) produces the nanocomposite with improved ability to inhibit electrical tree development as well as enhanced breakdown strength and heat resistance [10][11][12][13]. However, the influence of MMT dispersion morphology on the space charge formation and breakdown strength is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Improved Electric Strength and Space Charge Characterization in LDPE Composites with Montmorillonite Fillers

Liao

Bai

Yang

et al. 2013

Journal of Nanomaterials

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Space charge distribution and breakdown strength were investigated in composites of low density polyethylene (LDPE) and various contents of montmorillonite (MMT). The disperse performance of MMT in LDPE was observed with scanning electron microscopy (SEM) and X-ray diffraction. For MMT concentration of 1 wt%, the better intercalation of LDPE into MMT interlayers and the tighter interface structure between polymer-filler were observed, relative to MMT concentration of 3 and 5 wt%. Space charge profiles were obtained using the pulsed electroacoustic (PEA) method. Less space charge accumulated in the LDPE/MMT with MMT content of 1 wt% than that in pure LDPE, and space charge in the central of LDPE/MMT was much more uniformly. On the other hand, when MMT concentration was up to 3 and 5 wt%, large amounts of heterocharges were accumulated in the sample bulk. In MMT doped samples the dielectric strength increased up to a maximum at 1 wt% loading, and then decreases at 3 and 5 wt%.

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Section: Introductionmentioning

confidence: 99%

Improved Electric Strength and Space Charge Characterization in LDPE Composites with Montmorillonite Fillers

Liao

Bai

Yang

et al. 2013

Journal of Nanomaterials

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“…Nontreated iPP sheet showed the expected value of ε ′ in the measured frequency range of about 2.44 with a fall of just 0.8%. Izci and Bowler measured ε ′ in the frequency range of 10 −2 to 10 6 Hz and reported that ε ′ decreased only slightly, by about 0.5%. Also, in the our previous paper, we did not observe significant changes of ε ' with the frequency increase for fibrous iPP samples …”

Section: Resultsmentioning

confidence: 99%

Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts

Petronijević

Cerović²,

Dudić

et al. 2018

Polymers for Advanced Techs

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In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10−9 mol/cm3 to 1.25·10−7 mol/cm3. The qualitative analysis of potassium distribution in the polymer matrix was conducted by time‐of‐flight secondary ion mass spectrometry cross‐sectional record. The relative dielectric constant (ε′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.

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Characterization of compatibility of Polypropylene/Poly(butylene succinate) blends: Impact of weight ratios on interfacial polarization

Taktak

Ghorbel

Hammami

et al. 2022

Journal of Molecular Liquids

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Dielectric properties of isotactic polypropylene and montmorillonite nanocomposites

Cited by 4 publications

References 12 publications

Improved Electric Strength and Space Charge Characterization in LDPE Composites with Montmorillonite Fillers

Improved Electric Strength and Space Charge Characterization in LDPE Composites with Montmorillonite Fillers

Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts

Characterization of compatibility of Polypropylene/Poly(butylene succinate) blends: Impact of weight ratios on interfacial polarization

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